My my My my

How does air pressure affect a basketball

Does It Matter How Much Air Is in Your Basketball?

Did you ever notice that some balls bounce better than others? Baseballs, for instance, don't have much bounce at all, except for when they land hard on the ground in front of you and jump up to nail your shinbone.

Footballs bounce, but you can never tell where they're going. Tennis balls bounce well, as do soccer balls and basketballs. But did you ever notice that some of the same types of balls bounce better than others?

Having the right ball for the game you're playing is important. Having a ball that does what it's supposed to do is equally important. In this section, we'll explore why some balls bounce better than others, and what you can do to assure that the ball you're using is in top condition for the game.

So What Seems to Be the Problem?

If you have a ball that doesn't bounce properly, the immediate problem is that it will affect your game. The problem we'll attempt to solve during the course of this experiment, however, deals with air pressure.

Air pressure, simply put, is the push that air has against all surfaces that it touches. The more air there is in a contained area, the greater the air pressure.

Specifically, we'll try to determine what amount of air pressure in a basketball makes the ball (and hopefully the person using the ball) perform best.

In the next few sections, you'll learn a little bit about what air pressure is, and some of the effects it has on us and on our surroundings.

Air-as in the stuff we breathe-is matter. It has mass, or weight, and volume, meaning that it takes up space. It's funny to think about air as having mass and volume. You can't see it, and you don't sense that you're running into it as you run or walk. It's easier to get a sense of air and air pressure when you think of air that is contained within something, such as your basketball, an air mattress, or a bike tire.

Air is composed of different gases, including nitrogen, carbon dioxide, water vapor, oxygen, and others. All of these gases are composed of particles, or more scientifically, molecules, and they're all in constant motion.

As the molecules move about, they come in contact with surfaces of objects. The molecules push and press on those surfaces, exerting pressure on them.

It's that pressure that allows your basketball to keep its round shape and remain hard and bouncy. If air escapes from the ball, the pressure inside the ball changes. The problem you'll attempt to solve while doing this experiment is how these changes in pressure affect the ball.

If you like the title of this section, "Does It Matter How Much Air Is In Your Basketball?" you could use it as the title for your project. Or if you prefer, you could use one of these titles:

  • Getting the Bounce You Need from Your Basketball
  • How Much Pressure Is Needed for the Best Bounce?
  • How Air Pressure Affects the Bounce of Your Basketball

What's the Point?

Basketballs, along with other objects such as tires and footballs, are high-pressure products. This means that they require a lot of the force created by air pressure in order to get and stay fully inflated.

There are various measurements used for air pressure. Among them are pounds per square inch, millimeters of mercury, atmospheres, and pascals. In the United States, we measure this force using psi, or pounds per square inch. Conventional wisdom is that a basketball needs 8 psi to be properly inflated. A car tire, just for a comparison, needs 40 psi.

Most basketballs have inflation instructions printed right on them. Take a look and you'll probably see something like "INFLATE 7 to 9 LBS." For this experiment, a ball inflated to eight pounds per square inch will serve as the control. The same ball, but containing different amounts of air, will provide the variables.

Your challenge will be to determine if and how the amount of air inside your basketball causes it to bounce differently. You'll also determine whether the manufacturer's recommendation for the proper inflation rate gives the ball its best bounce.

What Do You Think Will Happen?

If you've ever pumped up a bike tire, an air mattress, or a ball, you've had some experience with air pressure. Blowing up a balloon, which nearly everyone has done, is another example of air pressure.

Excessive contained air can cause such force against an object that the object bursts. This happens frequently with balloons, which are fairly fragile. It happens less frequently with basketballs, which are sturdier objects, but it can occur.

A loss of air pressure within an object such as a ball or tire, however, also can cause problems.

Think about observations you may have made that relate to air pressure. Does your bike ride as well when one of the tires (or maybe both) has lost air? Does your ball bounce as well? If you've ever played tennis with a ball that's lost pressure, you'll understand why they're referred to as "dead" balls. A dead ball hits the court and drops, as if it is-indeed-dead.

Using your experience and observations, come up with a hypothesis concerning your basketball and whether the amount of air in it will affect the way it bounces. Do you think that increasing the level of air even above the manufacturer's instructions will cause -it to bounce better? What about if there's less air in it than recommended?

Materials You'll Need for This Project

You need only three things-with two optional, additional items-to conduct the experiment for this project. They are:

  • One basketball
  • One air pump with a pressure gauge
  • One tape measure or meter stick
  • One long piece of paper and tape (optional)

It's a good idea to find someone to help you with this experiment, which involves dropping a ball and measuring how high it bounces. It would be possible-but very tricky-to do the experiment by yourself. Besides, basketball is always more fun with a friend!

Conducting Your Experiment

To begin the experiment, you'll test how high the basketball bounces when it's inflated to 8 pounds psi-the recommended level for most models. From there, you'll increase or decrease the air pressure by putting more air into the ball or removing some air.

The trick will be to add or subtract air in measured increments so that you can keep track of where the pressure is.

Be sure to drop the ball each time from exactly the same height. Starting from different heights will make the results of your experiment invalid.

Drop the ball close to a wall, so you can calculate on the wall the height of the bounce. It would be a good idea to make a paper measuring tape and hang it on the wall so you can better judge the height of the bounce. If you don't, be sure to watch closely how high the ball bounces and use your tape measure or meter stick to measure up to the spot on the wall at which the top of the ball stopped.

Make sure that your basketball is at 8 psi before you begin the experiment. Be sure to record both the pressure of the ball and the height of the bounce as you move through the following steps. You can record all of your results on the data chart found in the next section, "Keeping Track of Your Experiment."

Follow these steps to conduct your experiment:

  1. Drop a basketball inflated to 8 psi from a height of 6 feet (1.8 meters). Be sure that the bottom of the ball-not the top-is at the 6-feet line when you drop it.
  2. Observe, mark, and measure the height of the ball's bounce, remembering to measure at the top of the ball. Record your measurement.
  3. Repeat steps one and two twice, recording your results as you go.
  4. Using the air pump with the pressure gauge, increase the psi of the ball by one inch, to 9 psi, and repeat steps one through three.
  5. Using the needle of the air pump, force as much air out of the ball as possible, then repeat steps one through three.
  6. Increase the pressure within the ball to 1 psi, then repeat steps one through three.
  7. Increase the pressure within the ball to 2 psi, then repeat steps one through three.
  8. Increase the pressure within the ball to 3 psi, then repeat steps one through three.
  9. Increase the pressure within the ball to 4 psi, then repeat steps one through three.
  10. Increase the pressure within the ball to 5 psi, then repeat steps one through three.
  11. Increase the pressure within the ball to 6 psi, then repeat steps one through three.
  12. Increase the pressure within the ball to 7 psi, then repeat steps one through three.

Once you've completed all the steps, you'll need to average the height of the bounce recorded in each of the three trials for each step. To find the average, add the three measurements together, then divide the total by three.

Recording bounce height.

Keeping Track of Your Experiment

As you conduct three trials for each of the basketball psi settings, you can record your information on the following data chart. Or you can make your own chart, if you wish.

Putting It All Together

Once you've recorded all your data onto the chart, you can plot it onto a graph, letting the x axis represent the pressure, and the y axis represent the height to which the ball bounced when dropped from 1.8 meters, or 6 feet.

Once you've completed your graph, you'll be able to clearly see if your findings prove, or disprove, your hypothesis.

Use this chart to keep track of how high your basketball bounces at different levels of inflation. Be sure to drop the ball from a height of 1.8 meters (6 feet).

Further Investigation

If you're a hands-on kind of person, and you enjoyed doing this experiment, you can think about taking it a step or two further.

You could do this by testing the ball in the same manner, but varying the temperature conditions. You might try bouncing the ball outside on a very cold day, and then, using the same psi settings, record the height of bounces in a nice, warm house.

You also could test balls made of different materials, but inflated to the same level of pressure. Or you can come up with your own ideas for similar experiments.

How Much Air Pressure Should a Basketball Have?

If you have played or watched basketball long enough, does it occur to you how much air pressure should a basketball have? Honestly, if you have not played basketball, you would think that it doesn’t even matter. But if you have played the sport, you would know that some balls bounce a lot better than others. Is it because of the brand? It could be a factor, but perhaps the most crucial element is air pressure.

Does it Matter How Much Air is In Your Basketball? 

We hate to answer with a little sarcasm, but aren’t we also concerned about how much air is in the balloons at some kids’ party? Or about how much air should be in our car tires? The answer is, of course, a resounding, yes! It would only be natural to prefer one basketball brand over another, but the main factor contributing to how good (or bad) your ball bounces is the air pressure.

What, then, is air pressure? It is the force or push of the air against anything that it comes in contact with. In this case, it is the leather or the rubber in a basketball. The more air there is inside, then the air pressure increases.

Needless to say, a basketball player should be worried if the ball is not bouncing correctly. It does slow your performance down, whether we are talking about shooting, dribbling, or the accuracy of passes. A basketball player that feels uncomfortable with how the ball bounces quickly becomes distracted and may even lose confidence throughout the game.

How Do You Measure Air Pressure in Basketball? 

You can measure air pressure in a basketball by using an air pump with a built-in pressure gauge. The recommended air pressure for a basketball is 7.5 to 8.5 psi (pounds per square inch). That is also the NBA basketball air pressure recommendation. As you can see, there isn’t a fixed air pressure endorsement by the NBA, but you can use this recommendation as a guide to getting the right air pressure.

How Much Air Pressure is in a NBA Basketball? 

As previously noted, the NBA basketball air pressure instruction is between 7.5 to 8.5 pounds per square inch. Some balls have air pressure recommendations printed in them, and it may state “up to nine pounds,” but obviously, the NBA prefers it to be just a little lower than the maximum allowable air pressure in a ball.

In the case of FIBA, the international governing body for basketball did not specify a pressure range. Instead, it indicates that the ball should bounce between 1,200 to 1,400 mm (47.2 to 55 inches) when dropped at the height of 1,800 mm (or approximately 70 inches). In addition to the “ball bounce” test, FIBA rules also mandate that the balls be subjected to fatigue strength, valve leak, practice, and heat storage tests.

Ironically, even with NBA basketball air pressure recommendations, the balls are rarely measured during games. That is because most pumps that are used do not have gauges, and even if they do, it does not accurately indicate air pressure. From that standpoint, FIBA’s “ball bounce” instructions appear to be a sound and practical procedure in determining the right basketball air pressure.

Will More Air in a Basketball Bounce Higher? 

Yes, more air in a basketball makes the ball bounce higher. Why? Because as you inflate the ball, the more compressed the air becomes so it can fit inside. 

Now, as it becomes more compressed, the air presses the inside of the ball with more force. If you are dribbling the ball, it produces a pushing action even more inside the basketball. The air pushes back, so to speak, with force equal to the amount of air pressure in the air. (This is known as the Third Law of Motion that briefly states: “In every action, there is always an equal and opposite reaction.”) That force is what thrusts the ball back up. If there is more air inside the basketball, it pushes harder back up when the basketball is bounced.

Again, the short answer would be, yes, it makes the ball bounce higher. But then again, it doesn’t hurt knowing the science behind it.

Does Temperature Affect the Bounce of a Basketball?

Yes, the temperature can affect the way a basketball bounces. Since we have already talked a little about science, then perhaps, we should continue on with it. It involves what is called the Ideal Gas Law, a combination of natural laws discovered by Boyle, Charles, Avogadro, and Gay-Lussac.

It states that there is a specific relationship between volume, pressure, and temperature in a confined system. To cut the geeky story short, it means that when a basketball is subjected to increased temperatures, the volume of the air pressure inside increases. The opposite is also true: If exposed to colder temperatures, a basketball’s air pressure decreases.

Understanding the concept of the Ideal Gas Law will make you aware of the playability of the ball. From that Law, we can assess that a temperature change of plus-10 degrees Fahrenheit can increase the pressure by a pound per square inch. Conversely, if you played in an environment that is 10 degrees colder, the basketball’s air pressure drops a pound per square inch. In the latter conditions, say, a ball has been inflated to 8 psi. It follows, then, that playing in such circumstances will drop the ball’s air pressure to 7 psi, a tad below the minimum recommended NBA basketball air pressure of 7.5 psi.

How Can You Tell if a Basketball is Pumped Enough?

It is pretty easy if you have an air pump with a gauge, but the thing is, gauges are also inaccurate to a certain degree. That is probably why the NBA gave a recommendation range of 7.5 to 8.5 psi to provide a room for error. All that being said, we think FIBA’s ball-bouncing recommendation should tell you if a basketball is pumped enough if you can’t find a gauge.

Does the Air Pressure in a Basketball Affect Your Shot?

This is a tricky question, and while we are inclined to say yes, air pressure does affect your shot, it might not be accurate in all cases. Air pressure may affect the result of the shot, but it should not affect your mechanics as long as it’s not too soft or squishy to the touch. It should not change the trajectory of the ball, either.

Now, how can air pressure affect the outcome of your shot? It’s because basketballs with higher air pressure often bounce farther off the rim while the ball with a lower air pressure has a higher chance to ricochet in or bounce near the basket. So, air pressure may affect how a ball bounces off the rim rather than affecting the shooting mechanics or the ball’s trajectory.

Wrapping Things Up: How Much Air Pressure Should a Basketball Have? 

A basketball should have the right air pressure for the players to feel comfortable handling it. Many will write off the importance of putting the correct air pressure on a basketball, but in reality, it is an essential part of the game. If the players are not comfortable with how the ball bounces during a live dribble, it can negatively influence his overall game.

There are really no rules on how much air pressure is needed in a basketball. If you’re just playing pickup or recreationally, it may all boil down to the preferences of the players. However, in the NBA, the recommended air pressure is between 7.5 to 8.5 pounds per square inch (psi).

In FIBA, they use a somewhat instinctive rule that a ball should not bounce higher than 70 inches and no lower than 47 inches. In our opinion, FIBA’s rule is a lot simpler and maybe even more accurate since air pressure gauges are not usually around. If there are gauges lying around, they may also not give the precise air pressure reading.

What many did not know, though, is that temperature can affect the air pressure in the ball. How so? Because of the Ideal Gas Law, it is found that a difference of 10 degrees Fahrenheit can approximately increase or decrease the air pressure by 1 psi. Knowledge of this natural law is essential, especially in the NBA. That’s because playing in certain temperatures can reduce the air pressure of the ball below the league’s recommended range.  

Now, if you’re wondering whether the ball’s air pressure can affect your shot, the short answer is no. It should not affect your mechanics as well as the trajectory of the ball. The issue lies in what happens after the shot. Simple physics suggests that a ball with too much air pressure bounces farther from the rim while the ball with the lower air pressure will likely bounce near the basket. All of these factors should be taken into consideration when we’re talking about how much air pressure should a basketball have.

Because you read this post, you might find our reviews on the best basketball pumps helpful.

We also answer other frequently answered questions on basketball here.

> What Size is an NBA Basketball?

> How to Clean a Basketball: The Ultimate Guide

> How to Inflate a Basketball Without a Needle or Pump?

Influence of air pressure on ball bounce height

  • Authors
  • Executives
  • Job files
  • Award documents

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

Diploma of a student Certificate of the head

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


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.

Item 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 origin 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. Communication with history and science

In the encyclopedia "I know the world" it is said 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 the Logger Lite program 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 .

Make sure the pressure sensor is connected to the adapter and the adapter is connected to the computer.

Start the Logger Lite program.

Open file for this experiment Air Ball (Air ball) .

Then did the following:

They took a basketball.

Reset 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 Data acquisition . 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 rebound 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.

Watched 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, twist the connection tip so that no more air escapes.

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 reach a test where the pressure was 5 kPa.

Data table (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



2. 073
















1. 003



















2. 074





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.


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 ).


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 - Head. from screen

[Electronic resource] Access mode: Head. from screen

Appendix 1

Experiment 1



Experiment 2



Experiment 3



Experiment 4



Experiment 5



Experiment 6



Experiment 7



Experiment 8



Annex 2

Instruction for inflating a basketball


The pressure in the ball is quite strongly influenced by the ambient temperature and atmospheric pressure.

It is better to inflate the ball directly where games or training are planned.

The ball must be inflated correctly! Before pumping, you need to shake the ball so that the chamber is in a vertical position, below the valve opening. Then pump it up.

Job views: 529

Basketball is a game of the strong and enduring | iMotion

Basketball fever

Dynamic, unpredictable, team spirit, agility and endurance - all these words accurately describe one of the most common ball games today - basketball. For those to whom the high educational and health value of basketball is not yet obvious, we will tell you how this sport can attract you.

Born in USA

In 1891 James Naismith, a teacher at the Christian Youth Association training center in Springfield, came up with this game. To spice up the gymnastics lessons, a young teacher attached two bottomless fruit baskets to the railing of the balcony, into which they had to throw a soccer ball. Hence the name basket is a basket, ball is a ball. Since then, basketball has become not only a popular sport, but also an exciting way to develop your body, educate character and strength of mind. The aim of the game is to take possession of the ball and shoot into the opponent's basket while the other team tries to prevent it. The ball is considered abandoned if it enters the basket from above and remains in it or passes through the net.

The benefits of playing basketball can be classified into two categories - recreational and educational . First, let's look at all the benefits of basketball for physical health.

Healthy body

1. All muscle groups are involved here. Body movements during the game involve not only running and throwing the ball, many body systems are trained, which makes the body work smoothly during the game, like a clock.
2. During sudden exertions, throws, jumps, runs and movements, the endurance of the respiratory apparatus and the cardiovascular system is trained . The heartbeat of athletes during the match reaches from 180 to 230 beats per minute, while blood pressure does not exceed 180-200 mmHg.
3. In addition, participation in the game has a beneficial effect on the functioning of the nervous system: subjected to certain loads, a person involved in basketball improves his peripheral vision, and this is a big plus that has a significant impact on the efficiency of visual perception.
4. Studies have shown that today regular basketball practice increases the sensitivity of visual perception of light impulses by 40% on average. In addition, a person becomes more collected, learns to control emotions, and also react more calmly to failures.
5. Basketball is a great sport for those who want to lose weight. Considerable energy costs for one productive game of basketball are approximately 900-1200 kilocalories. As a result, working muscles use a significant amount of body fat to consume the missing energy, gradually relieving a person of extra pounds.

If you have not yet decided what sport to do, the fact that you will lose weight in the process of an exciting game, making new friends, inspiration from personal and team victories will be a great motivation.

We educate character

The educational function of playing basketball largely depends on the observance of discipline and the regularity of training. Among the psychological characteristics that develop during basketball lessons, we will highlight the following: perseverance, courage, determination, honesty, self-confidence, a sense of collectivism. At the same time, the athlete's purposefulness and interest in the very process of improving his skills is important.

Children's basketball

The kids need it! A variety of technical and tactical actions of playing basketball and the actual game activity have unique properties for the formation of vital skills and abilities of schoolchildren, the comprehensive development of their physical and mental qualities. At 1948 year American teacher Jay Archer adapted this sports game for children aged 8 to 12 years. To do this, it was only necessary to reduce the size of the site, equipment and inventory. This is how mini-basketball was born.

You, the parents, will need approval of the child's determination and desire to play, support in case of failures and defeats ... And, of course, providing all the necessary equipment!

Basketball equipment

In order to make visiting basketball lessons comfortable and beneficial for you, you should take seriously the issue of choosing a place and equipment. First of all, you should take care of a light sports uniform that does not restrict movement. It should be made of materials that allow good breathability in cases of excessive sweating.

Learn more