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How much does a basketball weigh in pounds
How Much Does A Basketball Weigh? Everything You Need To Know
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Beginners in basketball may believe that all basketballs are the same weight. Yet, the ball’s weight might vary based on a variety of conditions. So, how much does a basketball weigh?
A basketball typically weighs between 1.3 and 1.5 pounds (21 to 22 ounces). The materials for the making of a basketball also affect its total weight.
Let’s dive right into the article with Scott Fujita!
Contents
What Is The Standard Weight And Size Of A Basketball?
NBA Basketball Weighs 1.4 pounds
Although basketballs come in a variety of sizes, the NBA basketball weight is typically the average. So, if we’re talking about the weight of professional NBA basketball, it’ll be approximately 1.4 pounds.
The diameter of the ring is 29.5 inches. The air pressure is another critical thing to consider, which requires a normal air pressure of 7.5 to 8.5 pounds per square inch.
How Much Does An NBA Basketball Weigh?
The Metric System Employs The Gram As The Measurement Of Weight.
Every player desires to play in the NBA, the most competitive and successful basketball league globally. Although there are various other organizations with varied styles, the NBA is the most well-known.
View more: How much are courtside seats at an NBA game
The proper weight for men’s basketball is 1.37 pounds, according to NBA regulations and specifications. The circumference, on the other hand, is 29.5 inches tall. As a result, you have a reasonable estimate of the weight of an NBA basketball.
Due to the physicality of females, the WNBA reduces the standard for weight and circumference. The WNBA basketball has a maximum weight of 1.13 pounds and a circumference of 28.5 inches.
How Much Does A Basketball Weigh In Grams?
Youth Basketballs Are Size 5
Do not worry if you do not know what pounds mean. The metric system employs the gram as the measurement of weight. Therefore, for your convenience, all the data is presented in gram form.
A basketball of size 4 weighs roughly 397 grams for junior balls. When compared to other sizes, it is relatively light, as previously stated.
The weight of the size 5 climbs dramatically, reaching 481 grams. Since this size is for youngsters aged ten and up, it is not difficult to comprehend. As a result, the weight and size of the players expand to fit their physique.
For their tournaments, several leagues and groups now collaborate with various manufacturing enterprises. Because it is the most competitive platform, the NBA is the gold standard for every basketball player. They utilize a 7-sized ball that is 623 grams in weight.
The WNBA uses a slightly different metric. They utilize a 6-sized ball that weighs 510 grams and has a 2-3 inches narrower circumference. If there is more air inflation pressure in the ball, these readings will alter as well.
The NCAA uses Wilson balls instead of Spalding balls. As a result, their men’s basketball weighs the same as the NBA but has a 30-inch diameter.
The weight of women’s basketball is roughly 566 grams, with a diameter of 29 inches. Basketball sizes are also measured differently by the International Basketball Federation.
Although they all weigh 566 grams, the production process causes them to feel somewhat different in hand. Men’s basketball has a circumference of 30.5 inches, whereas women’s basketball is 29 inches.
How Much Does A Youth Basketball Weigh?
Mini Basketball
The pro league for up-and-coming stars is the youth leagues, also known as junior basketball leagues. They do not play regular basketball and use a more miniature college basketball instead.
They also utilize mini basketballs, which are lighter than professional NBA basketballs. For conventional measures, youth basketballs are often designated as size 5.
It is lighter than NBA basketballs, weighing roughly 1.25 pounds. The circumference of the ring is approximately 27.5 inches. This sort of ball is used by any young player under ten for their regular training and games.
A 4-sized basketball may be used by anyone aged eight or younger. This ball is 25.5 inches in circumference, which is much less than that of conventional NBA balls. A size 4 is typically roughly 0.87 pounds.
How Much Does A Mini Basketball Weigh?
An Inflated Basketball Weigh At Least 22 Pounds.
Basketball sizes vary according to the gender, age, and skill level of the participants. For junior players in a school-level game, the ball may be of GL. The mini basketball typically weighs around 0.625 pounds (10 lb) or 283 grams (g) and is designed for children aged 3 to 5.
How Much Does A Women’s Basketball Weigh?
Women and men have various physical characteristics and features. As a result, the rules for basketball measuring varied. Women have their league, that’s the WNBA, where they may show off their prowess.
Basketball league sizes are mostly divided into two categories. The first is more extensive, measuring 29 inches in diameter and weighing 1.25 pounds. This basketball is a regular 6-inch basketball.
The other one is slightly smaller than 28 inches in diameter and weighs 1.125 pounds. According to the match requirements, condition, air pressure, inflation, and other criteria, the official match balls are chosen.
The standards for international forms follow the International Basketball Federation standards. While the Molten basketballs use some of the same materials as the Spalding basketballs, they are somewhat smaller and heavier.
These basketballs are high-quality leather. So, you should be able to spin a ball around your finger.
How Does A Properly Inflated Ball Weigh?
A Perfect Basketball Does Not Come With Sufficient Inflation.
In most cases, a perfect basketball does not come with sufficient inflation. If you’re playing on outdoor basketball courts, it is unlikely that you’ll notice.
The same cannot say the same for professional players who play regularly. You’ll wind up over inflating or under inflating your basketball if you don’t have a good understanding of properly inflated basketball weight.
The weight of an average inflated basketball must be at least 22 pounds. The inflation error margin, on the other hand, is roughly 0.03 pounds. So, if you stay in this range, that’s great.
How Is The Air Measured In A Ball?
Every Basketball Has Air Inside Of It.
The correct air pressure inside a basketball may make a massive difference in your game feel. However, to maintain appropriate pressure, you must understand how to gauge air pressure.
Here, you’ll learn how to maintain a high air density within the basketball by psi, or pounds per square inch, which is the standard pressure unit for basketball. Inside a basketball, the pressure should be between 7.5 and 8.5 pounds per square inch.
A pressure gauge is ideal for measuring air pressure, a standard instrument for determining the strength of a gas or fluid.
It is capable of calculating the overall pressure trapped inside a confined space. Gently put the gauge into the ball’s needle aperture while determining the air pressure. The psi within the ball will show on the dial or screen.
Final Thoughts
You can measure basketball in several different ways in circumference, inflation pressure, and total weight. When selecting a basketball, keep in mind your gender, age, and league you will use it.
Basketballs are sized and weighted differently in different leagues. As a result, understanding the proper size is critical to prevent getting disqualified from a game.
Hopefully, now that you are familiar with basketball sizes and have discussed how much does a basketball weigh in pounds, grams, or ounces and how it influences player performance. So, you will have a better understanding of the game.
How Much Does a Basketball Weigh?
When Dr. James Naismith invented basketball in 1891, he used peach baskets as goals and soccer balls (weighing only 16 ounces) for the first two years. Since then, the weight of a basketball has changed when the first basketball made of laced leather was manufactured in 1894. Decades later, genuine leather was used and then composite leather in the 1990s up until now. Because we now have standard basketballs in production, how much does a basketball weigh?
Before we answer that question, let us examine why the weight of a basketball is critical.
How Important is the Weight of a Basketball
There are standards for basketball size and weight for a reason. Can you imagine all these big guys at the NBA still shooting basketballs the size and weight of soccer balls? A properly inflated ball and one of the correct size are essential for proper skill development and basketball players’ safety.
Does a ball that is not adequately inflated affect the training of a basketball player? Of course! A ball with too little air will be too flat and impossible to dribble. An overly inflated basketball may also be challenging to dribble as it tends to stay high and difficult to control when shooting. Moreover, improperly catching an overly inflated ball or reaching for it as a defender may cause jamming of the fingers.
Thus, for the safety of the players and for their skill development, there is no other way but to use a properly inflated ball of the correct size and weight.
What’s the Standard Weight of a Basketball to Have?
If we are talking about a standard NBA basketball, the standard weight is 22 ounces or around 1. 4 pounds. (The weight of basketball in kg is 0.623 kg.) It measures 29.5 inches in circumference and is inflated to about an air pressure of 7.5 to 8.5 psi (pounds per square inch).
However, depending on the level of basketball you are playing, the official sizes and weight of the ball may vary. Let’s take a look.
How Much Does a Basketball Weigh in Various Basketball Leagues?
NBA Basketball Weight
As mentioned, the NBA basketball weight is 22 ounces or 1.4 pounds, give or take. (That is 623.69 grams if we are using the metric system.) The official NBA basketball has a circumference of 29.5 inches and an air pressure of 7.5 to 8.5 psi. The official NBA basketball is commonly referred to as a size 7.
WNBA Basketball Weight
The WNBA and the NBA may have a similar 10-foot hoop and 50 feet x 94 feet of court, but there is a slight difference between the weight of the basketball they use. While the NBA uses a basketball with a 29. 5-inch circumference, the WNBA uses a size 6 basketball, which measures 27.75 inches and weighs 18 ounces. If inflated to around 8 psi, the ball may reach a maximum of 28.5 inches in circumference and up to 20 ounces in weight.
NCAA Basketball Weight
Official NCAA basketballs are manufactured by Wilson, and it is a little bigger than the Spalding basketball the NBA uses. (The NBA has dropped its partnership with Spalding after this season and will use Wilson basketballs starting in 2021-22.)
The maximum circumference of a standard NCAA basketball is 30 inches and a weight of 22 ounces. The seams are no wider than 0.25 inches. On the other hand, a women’s NCAA basketball has a similar seam width but is only at around 20 ounces in weight and 29 inches in circumference.
FIBA Basketball Weight
The official balls used in FIBA basketball competition are manufactured by a company called Molten. Typically, the men use the GL7 series, and the women use the GL6. It is a little less heavy than Spalding and Wilson basketballs, weighing only 567 grams or 20 ounces. While it weighs less than an NBA basketball, it is also slightly more prominent at a circumference of 30.7 inches for men. Women’s basketball is around 29 inches in circumference.
How Much Does a Youth Basketball Typically Weigh?
Most of the junior or youth basketball leagues use a college ball. Otherwise, if a youth basketball is used, they weigh significantly less than NBA or college balls.
Typically, a youth basketball is referred to as a size 5 basketball. It is about 27.5 inches in circumference (70 cm) and weighs around 20 ounces (1.25 pounds). Most kids up to 10 years old use this type of basketball.
If need be, children eight years old and below use a smaller basketball. It is often referred to as a size 4 and weighs only 14 ounces with a circumference of 25.5 inches. After the size 4, the size 3 is what is referred to as a mini-basketball. It only weighs 10 ounces with a circumference of 22 inches.
Basketball Sizes and Weight
We have already outlined the basketball sizes and weight above, but for the data to be more comprehensive, let’s put it in one table below:
Basketball Size
Circumference
Weight
Remarks
Size 7
29.5 inches
22 ounces
This is the official size and weight of an NBA and NCAA basketball. Recommended for basketball players 15 and above.
Size 6
28.5 inches
20 ounces
This is the official size of a WNBA and women’s NCAA basketball. It is recommended for boys and girls 12-14 years old.
Size 5
27.5 inches
17 ounces
Recommended for boys and girls from 9-11 years old and is most often referred to as a youth basketball.
Size 4
25.5 inches
14 ounces
For boys and girls eight years old and below, preferably as young as five years old.
Size 3
22 inches
10 ounces
Often referred to as mini basketball, it is recommended for kids 4-8 years old.
Size 1
16 inches
8 ounces
Often called the micro-mini basketball, the size 1 is best used by pre-school children 2-4 years old.
FIBA basketball
Up to 30.7 inches
20-22 ounces
A FIBA basketball, which uses the Molten brand, is officially a size 7 but may have a circumference of up to 30.7 inches. Women’s international basketball also uses a size 6, but with slight variations in circumference and weight.
Nerf ball
9-20 inches
1-5 ounces
Ball made of foam, plastic, or rubber and is recommended for toddlers.
7 Random Facts about Basketballs:
1. Spalding was the first manufacturer of basketballs in 1894 based on the design of the existing baseball. It has been the official manufacturer of NBA basketball since 1983 and until the 2019-20 season.
2. The Japanese manufacturer has been the official manufacturer of the balls used in international basketball competitions (including the Olympics and World Championships) sanctioned by FIBA. It has been doing so since 1982 until now.
3. The official Spalding NBA basketball is made of the finest full grain leather and costs a shade under $170.
4. Spalding became the official ball manufacturer of the Euroleague in 2012.
5. Albert Goodwill Spalding, the Spalding founder, was a pitcher for the Boston Red Stockings with an overall winning percentage of .796. He is also the first pitcher to get 200 wins.
6. Molten basketballs were made the Tokyo 1964 Olympics’ official basketball, only six years after the company’s inception.
7. Wilson has been the official partner of NCAA basketball since the 1990s and will take over as the NBA’s official basketball in the 2021-22 season. It was also the first partner of the league from 1946 until it was replaced by Spalding in 1983.
Wrapping Things Up: How Much Does a Basketball Weigh
For non-basketball fans, talking about the weight of a basketball seems irrelevant. However, for the sake of skill development and consistency, standard measurements of a basketball have been developed through the years.
In the game’s inception, Dr. Naismith has to make do with what’s already there– in this case, peach baskets and soccer balls. Soccer balls typically weigh around 16 inches and compared to the basketball sizes today, that’s about the weight of a size 5 basketball, one recommended for 9-11-year-old kids. It must have been pretty uncomfortable to shoot with!
As mentioned, there are already standard or official basketball sizes and basketball weights. A size 7 is the one used in the NBA and men’s NCAA. It is usually 22 ounces in weight, 29.5 inches in circumference, with air pressure between 7.5 to 8.5 psi. It is also the recommended ball for boys aged 15 and up. A size 6 basketball is the one used by the WNBA and NCAA. Tournaments for girls aged 12-14 years old use a size 6 basketball– 28.5 inches in circumference and 20 ounces in weight.
From there, youth basketball uses a different basketball weight and size. A size 5 basketball, 27.5 inches in circumference, and 17 ounces in weight are usually referred to as a youth basketball. A size 4 basketball is for kids 5-8 years old, and a size 3 basketball is often called the mini basketball. Even smaller than that, a size 1 basketball is called the micro-mini basketball; because, after all, it is only 16 inches in circumference and weighs only 8 ounces.
The Molten basketballs used in FIBA competitions, including the Olympics and World Championships, are also officially a size 7. That means they also weigh 22 ounces, but they may have a circumference of up to 30.7 inches rather than the typical 29.5.
Why is it important that we know all about the weight of basketball and its sizes? It is essential because it is not safe and is not conducive to basketball skills development. How so? An underinflated basketball is virtually impossible to dribble, while an overinflated basketball is hard to control and may injure fingers after a wrong catch. Because of these reasons, it is very critical to use basketballs and their recommended weight and sizes.
Those who are not familiar with basketball may get confused about the question, how much does a basketball weigh? After all, a ball is just a ball, right? Wrong! Official basketball weight and sizes exist for a reason, and as basketball players, it would be in our best interest to follow these propositions.
If you enjoyed this post, you’ll like our other basketball FAQ articles here.
Also, check out our basketball reviews here.
size, weight, diameter, main features and properties of
Danila Chezhin
The word basketball consists of two English words - basket (basket) and ball (ball). The first part of the name arose because in the original version of the game, instead of a ring and a shield, a regular fruit basket with a cut-out bottom was used. What about the second part? What should be a basketball? What material is used to make it? Are there standards that establish the diameter and weight of the main basketball projectile? Look for answers to these and other questions in our article.
The main characteristics of the ball for basketball
The material used for the manufacture of modern basketball spheres is artificial leather. Every year, equipment manufacturers modernize the coating and improve the quality of the workmanship, making the ball more and more comfortable for athletes.
The optimum pressure for an inflated game ball is 7 to 9 psi, pounds-force per square inch.
It is customary to play basketball with an orange ball with black lines drawn on it, which divide the sphere into 8 equal parts. But this is not a dogma - in tournaments of different levels there are official balls of other colors. Much more important is the weight and diameter of the projectile.
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Weight, size and circumference of a basketball
The so-called "seven" is used in men's team competitions. The weight of a size 7 basketball is from 567 to 650 grams. The diameter of the circle is 749-780 millimeters.
The diameter of the basketball used in women's competitions is smaller - from 724 to 737 mm. Weight - 510-567 g.
Children and young men play the so-called "five". This ball is even smaller and lighter. 690-710 millimeters is the allowable circumference. The mass of the ball of the 5th size is 470-500 g.
Different sizes of balls result from different hand physiology. Obviously, the smaller the grip, the smaller the ball.
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FIBA Basketball
Basketball size standards are the same in European and American basketball. The differences are only in the manufacturing companies. The official ball of tournaments under the auspices of FIBA, the main European basketball federation, is the model of the Japanese company Molten, one of the largest market players in the world.
Competitions under the auspices of the Russian Basketball Federation are also held by the Molten model.
NBA Basketball
Spalding has been the official ball in North American Major League Basketball for many years. Moreover, the artificial leather model, introduced into use at some point, was not recognized by the players' council. As a result, the NBA returned to the traditional natural turf model.
The NCAA college basketball league in the United States uses a Chicago-brand Wilson ball. The same model is used in Russian university sports tournaments.
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Types of basketballs
With the growing popularity of street basketball 3x3, streetball, manufacturers have become more active. Balls for the hall are not suitable for playing on asphalt, as they quickly lose their qualities. Therefore, numerous companies produce a huge number of specialized shells for the "street". The most famous balls are the American Rawlings, which are played in almost all major three-on-three basketball tournaments.
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Influence of air pressure on ball bounce height
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Chernyshev G. S. 1
1GBOU School 2120
Vagidova Z.R. 1
1GBOU School 2120
The author of the work was awarded a diploma of the winner of the III degree
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The text of the work is placed without images and formulas. The full version of the work is available in the "Files of the work" tab in PDF format
Introduction
The ball is one of the most favorite toys for boys of all ages. There are many ball games such as football, volleyball, basketball, golf. Each game has its own ball. We know that there is air inside any ball. Therefore, the question arises: why don't all balls bounce?
Relevance: the ball is one of the most important attributes of games. Knowing the properties and types of balls helps in choosing them. Each person should have an idea about the physical phenomena and laws that he directly encounters in everyday life from childhood.
The purpose of is to study the effect of ball pressure on the height of the jump on the height of the first bounce.
Object is a basketball.
Item - air pressure in the ball.
To achieve this goal, it was necessary to solve a number of tasks:
1. Collect literature on the topic;
2. select research methods;
3. study the history of the ball, its varieties; 4. find out what sports games are played with the ball; 5. conduct an experiment explaining why the ball jumps to different heights after the amount of air in it changes;
6. draw conclusions.
Thanks to the following methods , a study was performed:
- work with Internet sources;
- work with literature;
- analysis;
- comparison.
Starting the study, we put forward the following assumption : if you release air from the ball, it will bounce lower.
Problem question of our study is: How does the amount of air in a basketball affect how high it bounces? How do basketball players determine how much air a basketball needs to have in order to play?
The novelty and practical significance of our study as a whole lies in the choice of the ball as the object of study.
1. Theoretical part.
1.1. Connection with history and science
The encyclopedia "I Know the World" says that the ball is one of the most ancient and favorite toys of all countries and peoples. In ancient Greece, it was considered the most perfect object, since it had the shape of the sun, which means (as the Greeks thought) it had its magical power. They sewed balls from leather and stuffed them with some elastic material, for example, moss or bird feathers. And later they guessed to inflate the leather ball with air. Such a ball was called "follis". Small follices were used for hand games, and large balls were used for games like football. Images of balls were found on the walls of Egyptian tombs, and during excavations of the burial places of the pharaohs, balls themselves were found, sewn from strips of leather or tree bark, and sometimes made of sandstone. The team games of the Egyptians with these items were dedicated to the gods, each team represented the interests of a group of celestials, the ball was driven into the gate with curved sticks. [1 And in ancient China they played ball, for example, by kicking it with their foot. The game eventually became a favorite folk entertainment, and in the 2nd century BC. included in the obligatory program of the solemn celebration of the birthdays of the emperor. At the same time, instead of stuffing with bird feathers and animal hair, they learned to fill leather balls with air, developed rules, and began to install gates on the playing field. The winners were honored with flowers, awarded with valuable gifts, and the losers were beaten with bamboo sticks. In ancient Japan, too, they could not do without a ball. At the imperial court, team games were held to drive the ball into the goal for a certain time (measured by the hourglass), during the throw it should not touch the ground. In Russia, the balls were different. In excavations near Novgorod, balls of various sizes were found, sewn from leather. They were played by children in the 13th century. Peasant children played with light balls made of birch bark or heavy balls tightly rolled from rags. Even information about one of the games has been preserved: they put chicken eggs in a row and knocked them out with a ball. In the Khotkovsky nunnery near Moscow, balls were sewn from soft pillows, and pebbles wrapped in birch bark were put inside - it turned out to be a ball and a rattle at the same time. By the way, the origin of the word "ball" is associated with the words "soft, pulp, crumb." That is, the ball is a soft ball.
Modern balls vary in size and purpose. Different balls are used for playing volleyball, basketball, football, tennis, water polo, rugby and other games.
Each of them has its own story. The name of the game of basketball came from the English words "basket" - "basket" and "ball" - "ball". This game was invented by D. Naismith, a sports instructor from one of the American universities, in 1891. At his direction, a large fruit basket was nailed under the ceiling of the sports hall and a ball was thrown into it. When the players got tired of climbing for the ball every time, it occurred to someone to just knock the bottom of the basket out. At first, basketball players used leather balls, and then switched to rubber ones.
The basketball must be spherical and must be the specified shade of orange with the traditional pattern of eight inlays and black stitching. The mass of the ball (officially accepted size 7) is 567-650 g, the circumference is 750-780 mm. Smaller balls are also used: in men's team games, "size 7" balls are used, in women's team games - "size 6", in mini-basketball matches - "size 5".
1. 2. Definition of concepts
Working with the dictionary of S.I. Ozhegov, we learned that a ball is an object for playing a solid or full ball made of an elastic material inside, which bounces off a hard surface upon impact. [2]
Pressure is a physical quantity equal to the ratio of the force acting perpendicular to the surface to the area of this surface.
Unit of pressure - Pascal (Pa). Using also other pressure units: hectopascal (hPa) and kilopascal (kPa) 1 kPa = 1000 Pa 1 Pa = 0.001 kPa 1 hPa = Pa 1 Pa = 0.01 hPa
The force arising in the body as a result of its compression and stretching (deformation) tending to return the body to its original position is called the elastic force.
According to the free encyclopedia "Wikipedia" elasticity is the property of solid materials to return to their original shape during elastic deformation. Solid objects will deform after a force is applied to them. [3]
Basketball size
First of all, when choosing a ball, you should pay attention to the size of the basketball. Size 7 means you are holding a ball that is suitable for men. Its weight can range from 567 to 650 grams. Size 6 is primarily used in the games of teenagers under 16 and adult women's teams. In addition to the circumference, its weight has also been reduced - from 510 to 567 grams. Size 5 is officially suitable for training and games of junior teams, with a weight of 470-500 grams. Of course, in your training you can use the size of the ball that you have at hand. By learning to handle a size 7, you are more likely to master a size 6 with ease. Unfortunately, the inverse doesn't always work.
2. Practical
In the practical part, we had to solve the following tasks:
- determine how the height to which the basketball bounces changes when the air pressure changes in it;
- build a graph based on the received data;
- draw conclusions based on the data obtained.
Different manufacturers measure pressure in different units, psi (pounds per square inch), bar (pressure unit approximately equal to one atmosphere), kgf/cm² (one kilogram of force per square centimeter), kPa (kilopascal). In the United States of America, the pressure inside the ball is usually measured in pounds per square inch (lb/dm 2 ).
We experimented with the amount of air in a basketball, but for measurement, we used units that are accepted in our country, namely kilopascals (kPa).
We measured the amount of air in a basketball and then used a distance sensor to measure how high the ball bounced.
Materials and equipment:
-Computer with Logger Lite installed on it;
-Go!Link adapter;
- Gas pressure sensor;
- distance sensor;
- Basketball;
- Stopper with needle, stem and tube;
-Measuring ruler.
Our experiment was carried out according to the following algorithm:
To configure the sensors for data collection, you need:
Check distance sensor connection to computer.
Set the distance sensor switch to position Normal .
Verify that the pressure transducer is connected to the adapter and that the adapter is connected to the computer.
Launch the Logger Lite program.
Open file for this experiment Air Ball (Air ball) .
Then did the following:
They took a basketball.
Zeroed the pressure sensor by pressing the Reset button on the toolbar. Next, the sensor measured the pressure in the same way as the measuring device on a bicycle pump.
Moistened the needle attached to the pressure transducer and inserted it into the ball.
Recorded data in the first line of the column "Actual pressure" of the data table.
Attached the distance sensor at a height of 2.3 m.
To collect data, did the following:
Hold the ball directly under the sensor so that the space between the ball and the sensor is about 15 cm.
Button pressed Collect data . Hearing the click of the sensor, they released the ball from their hands so that it hit the floor and bounced. No need to throw the ball with force!
Next, press the button View, to determine the position of the floor relative to the sensor and the distance to the ball at the top of the bounce ball #1. We recorded the obtained data in a table.
Next, we gradually reduced the pressure in the ball:
Moistened the needle attached to the pressure transducer and inserted it into the ball.
Watch the pressure reading on the screen.
Released some air.
Watch the pressure reading on the screen until it drops by 20 kPa (for the first time, the pressure will drop from 124.88 kPa to 105.79 kPa).
When the pressure dropped by 20 kPa, screwed the connector so that no more air escaped.
Recorded the value in the second line of the "Actual pressure" column of the data table.
Repeat steps 3-7 for 80 kPa, 60 kPa, etc. until you get to a test where the pressure was 5 kPa.
Table of received data (graphs are in the appendix):
Drop height 2.321 - ball distance 0.214 m = 2.107
No. experiment
Low point
Rebound top
No. 1
Rebound Height #1 = Distance to Floor - Rebound Top #1
Pressure
1
2. 073
0.714
1.359
124.88
2
2.038
0.834
1.204
105.79
3
2.075
0.914
1.161
80.1
4
2.074
1. 003
1.071
60.1
5
2.044
1.154
0.890
40.1
6
2.075
1.344
0.731
20.1
7
2.080
1.5
0.580
10
8
2. 074
1.584
0.490
5
Pins:
There is a pattern of change in the height of the rebounds with a decrease in pressure in the ball - the height of the rebounds decreases. The lowest air pressure in the ball allowed for playing basketball: 80 kPa.
Conclusion
What is basketball training without the main attribute of the game - a basketball? It is the basketball that gives us the opportunity to enjoy the gameplay in all its diversity.
Often when inflating a basketball, the question arises whether to inflate it more or less. We have to resort to the help of the Internet in search of information regarding this issue. We decided to answer the question, what is the optimal pressure should be in a basketball, since with the wrong level of pressure, the wear resistance of the chamber increases, which may simply not withstand and burst; there is a risk of injury; unpredictable flight path. The lowest air pressure in the ball allowed for playing basketball: 80 kPa.
Our study was carried out using Logger Lite software, Go!Link adapter, gas pressure sensor, distance sensor.
To achieve the goal, tasks were set that were successfully solved. To begin with, the literature on this topic was collected. Its analysis is presented in the theoretical part.
Getting to the practical part, we have identified research methods. Thanks to them, our study "The effect of air pressure on the height of the ball rebound" was carried out.
The hypothesis that we put forward at the beginning of the work was confirmed.
Having completed this study, we have developed a memo for fans of the game of basketball ( Appendix 2 ).
References:
I know the world. Sports: children. encyclopedia. - M.: AST: Astrel: Transitbook, 2006 - 382.
Ozhegov S.I. Explanatory Dictionary of the Russian Language, M .: LLC "A TEMP", 2008. p. 810
[Electronic resource] Access mode: Wikipedia - Title. from screen
[Electronic resource] Access mode: https://sportyfi.ru/basketbol/myach/kak-nakachat/ Head. from screen
Appendix 1
Experiment 1
Height
Pressure
Experiment 2
Height
Pressure
Experiment 3
Height
Pressure
Experiment 4
Height
Pressure
Experiment 5
Height
Pressure
Experiment 6
Height
Pressure
Experiment 7
Height
Pressure
Experiment 8
Height
Pressure
Annex 2
Instruction for inflating a basketball
Remember:
The pressure in the ball is quite strongly influenced by the ambient temperature and atmospheric pressure.
They utilize a 7-sized ball that is 623 grams in weight. 
They do not play regular basketball and use a more miniature college basketball instead. 
The mini basketball typically weighs around 0.625 pounds (10 lb) or 283 grams (g) and is designed for children aged 3 to 5.
However, to maintain appropriate pressure, you must understand how to gauge air pressure. 
As a result, understanding the proper size is critical to prevent getting disqualified from a game. 
Can you imagine all these big guys at the NBA still shooting basketballs the size and weight of soccer balls? A properly inflated ball and one of the correct size are essential for proper skill development and basketball players’ safety.
4 pounds. (The weight of basketball in kg is 0.623 kg.) It measures 29.5 inches in circumference and is inflated to about an air pressure of 7.5 to 8.5 psi (pounds per square inch). 
5-inch circumference, the WNBA uses a size 6 basketball, which measures 27.75 inches and weighs 18 ounces. If inflated to around 8 psi, the ball may reach a maximum of 28.5 inches in circumference and up to 20 ounces in weight.
It is a little less heavy than Spalding and Wilson basketballs, weighing only 567 grams or 20 ounces. While it weighs less than an NBA basketball, it is also slightly more prominent at a circumference of 30.7 inches for men. Women’s basketball is around 29 inches in circumference.
Tournaments for girls aged 12-14 years old use a size 6 basketball– 28.5 inches in circumference and 20 ounces in weight.
How so? An underinflated basketball is virtually impossible to dribble, while an overinflated basketball is hard to control and may injure fingers after a wrong catch. Because of these reasons, it is very critical to use basketballs and their recommended weight and sizes.
What about the second part? What should be a basketball? What material is used to make it? Are there standards that establish the diameter and weight of the main basketball projectile? Look for answers to these and other questions in our article. 
The weight of a size 7 basketball is from 567 to 650 grams. The diameter of the circle is 749-780 millimeters. 
Balls for the hall are not suitable for playing on asphalt, as they quickly lose their qualities. Therefore, numerous companies produce a huge number of specialized shells for the "street". The most famous balls are the American Rawlings, which are played in almost all major three-on-three basketball tournaments. 
S. 1
Each person should have an idea about the physical phenomena and laws that he directly encounters in everyday life from childhood. 
draw conclusions. 
The team games of the Egyptians with these items were dedicated to the gods, each team represented the interests of a group of celestials, the ball was driven into the gate with curved sticks. [1
The name of the game of basketball came from the English words "basket" - "basket" and "ball" - "ball". This game was invented by D. Naismith, a sports instructor from one of the American universities, in 1891. At his direction, a large fruit basket was nailed under the ceiling of the sports hall and a ball was thrown into it. When the players got tired of climbing for the ball every time, it occurred to someone to just knock the bottom of the basket out. At first, basketball players used leather balls, and then switched to rubber ones. 
2. Definition of concepts 
Solid objects will deform after a force is applied to them. [3] 
Next, the sensor measured the pressure in the same way as the measuring device on a bicycle pump. 
We recorded the obtained data in a table. 
073 
003 
074 
We decided to answer the question, what is the optimal pressure should be in a basketball, since with the wrong level of pressure, the wear resistance of the chamber increases, which may simply not withstand and burst; there is a risk of injury; unpredictable flight path. The lowest air pressure in the ball allowed for playing basketball: 80 kPa. 
