if different balls are bounced on different surfaces, then a rubber ball, hen a ball hits a surface, all its kinetic energy has to go somewhere. Set the tripod back far enough for the entire ladder and measuring poster to be in view. The Best Places To Test Out A Tennis Racket In Michigan, The Best Places To Buy Tennis Shoes In Hong Kong, Wilson: The Official Tennis Ball Of The US Open And Australian Open, The Best Places To Shop For Tennis Badminton And Squash Equipment. Tennis balls bounce differently in the high altitude and at sea. Each can from the same manufacturer can be different. For the lower heights the flight time of the ball was extremely short and again it was difficult to move ones head over the distance from h. Do a larger amount of results; 1cm, 2cm, 3cm, 4cm etc. In my science fair experiment, the golf ball overall was the ball that bounced the highest. By clicking Accept All, you consent to the use of ALL the cookies. Then draw a line to connect the dots. It therefore hits more air particles each second and so the force of drag is bigger the faster the ball goes. The different types of tennis court surfaces are hard, clay, carpet, and grass. This results in faster . A cold tennis ball bounces lower than a warm one. Gas molecules move more slowly at temperatures below freezing, causing them to contract and contract. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. Copyright 2002-2023 Science Buddies. Watch the video of the dropping tennis ball. This is due to two factors. Determine how high the ball rebounds on its first bounce. Copyright 2002-2023 Science Buddies. Then when it bounces up, it returns to its original shape. carpet, tennis 57 cm 56 cm 61 cm 58 cm I used a Flexible measuring tape to measure. Reproduction of material from this website without written permission is strictly prohibited. The longer it takes to stop, the higher it bounces to. Ball trial 1 trail 2 trial 3 average A tennis balls trajectory is determined by its temperature. Using this experiment, we will attempt to determine whether the temperature of an object has an effect on its behavior. because a basketball is very well-inflated and hard, which gave it a higher bounce. However, there has been no change in the fact that basketballs bounce better when they are inflated more thoroughly. As the ball has less KE and is travelling slower it becomes stationary faster at the top of its arc. Each ball in a can is different in weight, diameter, and bounce. Abstract and Figures. It provided me with five repeats so that the maximum and minimum results could be discounted and a reliable average could be taken. Hypothesis: if different balls are bounced on different surfaces, then a rubber ball would bounce the highest on a hard, smooth concrete surface because a rubber ball is well-inflated and made of rubber which would give it more kinetic energy and less air resistance. Some of the balls energy can be converted into heat. Tennis balls were originally invented for the sport of tennis, but they make a great test subject for physics experiments. The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. Changes in air pressure could have affected results as could changes in temperature however changes in these two factors would have been small; air pressure would not have changed enough to affect the results in the hour period in which the experiment was conducted, and although the rooms temperature may have increased by a degree or two, due to body heat, over the course of the period temperature was not a major factor that affected the height to which the ball bounced and would not have significantly affected the results. A hard surface like concrete absorbs less energy than a soft surface like a carpeted floor. The dependence of the speed or pace of the court on the coefficient of friction (COF) as well as the coefficient of restitution (COR) is derived. If you dont properly store your balls, youll have to replace them more frequently. 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Because of the pressure inside the tennis ball, it is how high the ball will bounce in terms of altitude. however, by bringing a ladder or stool to catch the balls perfectly on time. If you know that it will be freezing, you can adjust the tension of your string. Calculating the coefficient to restitution of ball hitting the floor: The coefficient to restitution can be found out from a graph of h1against h2. it goes back into the ball, giving it more force to pop back up into the air. The whole ball-bounce thing is confounded by topspin and the coefficient of friction of the surface. As velocity increases air resistance increases in proportion to the square of the velocity. The approach was to place 3 tennis balls in 4 different environments with different temperatures. Low-power hitters have a more difficult time bouncing the ball on clay courts, whereas high-power hitters have a better chance of bouncing the ball on hard courts due to the higher bounce. This is why you should have seen that when you bounced the basketball on a relatively hard surface it bounced higher (it lost less energy) compared with when it was bounced on a softer surface . The average variation between results was 3cm. If you want to make the ball bounce lower, you can try cooling it down by putting it in the fridge or freezer for a few minutes. Concrete will help bounce a ball the highest as it's hard and For two balls moving towards each other, you can work it out by adding up the speeds of the two balls. For instance, you can use old balls for the second round of the experiment compared to new balls. Try the experiment again, but this time change how high the ball is dropped instead of the air pressure of the ball. were able to construct a successful experiment. The bounce of a cold superball is shorter than that of a warm superball. Instead, as the ball is still always loosing GPE so long as it is still falling, all GPE is converted into thermal energy. Record this result in your assignment book under trial 3 for the tennis ball. The pressure on the ball is created by the air pushing against it. The balls dropped from 75 centimeters will bounce higher than those dropped from 50 centimeters, and the balls in the 50 centimeter trials will bounce higher than those in the 25 centimeter trials. A tennis court is the venue where the sport of tennis is played. A totally accurate experiment would have a variation between results equal to zero however an experiment that is totally accurate needs to be conducted under conditions where air pressure and temperature remained constant, error produced by the ball falling on different parts of the linoleum floor tile (which was not totally even and thus produces inaccurate results) and human error removed by dropping the ball onto a uniform surface and using machinery to record the height to which the ball bounced to. When it hits the ground, the bottom of the ball becomes flat against the floor. This is called the relative speed. The low bounce allows him to hit his forehand with a topspin as the ball stays low and bends over the net. This cookie is set by GDPR Cookie Consent plugin. There are many other great ball projects in this fun book by Madeline P. Goodstein. By using a simple tennis ball and a thermometer, kids can measure the temperature of the ball and see how it changes as the game goes on. It shows that heights were recorded that exceeded the height that the ball would have reached had it been dropped in a vacuum. The ball has reached its terminal velocity and cannot fall any faster (unless dropped in a vacuum). - tennis ball x The effect of surface on the bounce height of a tennis ball. This cookie is set by GDPR Cookie Consent plugin. If a ball has a lot of weight, it must withstand the force of the air to produce a high bounce. We also use third-party cookies that help us analyze and understand how you use this website. ping pong 2 cm 3 cm 2 cm 2 cm, basketball 82 cm 84 cm 80 82 Most of the falls energy goes into bouncing the ball back up after it falls, because a hard surface like concrete or hardwood doesnt absorb any. measured the heights. It is also necessary to warm a ball, because the energy inside it is released. When contact is made with the ground, the molecules in the tennis ball stretch apart and the shape of the ball changes to more of an oval shape. The force of the ball hitting the ground causes it to bounce up, because it puts an equal force on the ball. . Most experiments investigate the effect of an independent variable on a dependent variable. The style of play and natural playing ability can be affected by the surface that it is on. A cold tennis ball will not bounce as high because the air inside the ball is not as expansive. This means that the faster that the ball travels the larger the force of air resistance upon it. Keep releasing pressure and repeating the experiment until the ball no longer bounces. Although we were correct about This will be a table tennis ball. The impact duration was between 65 and 71 ms. Vacuum pump, rigid plastic cylinder, two large rubber bungs to fit over the two ends of the plastic cylinder, table tennis ball, Two meter stick rulers. The bounce of the ball is a major factor in the game of tennis. This would allow one to find the terminal velocity of the ball. Also the ball flattening upon impact doesnt have to be taken into account whereas if one was measuring from the top of the ball as it hits the floor to the top of the ball before dropping it or at the top of its arc after bouncing or the middle of the ball as it hits the ground to the middle of the ball before dropping it or the middle of the ball at the top of its bounce then the fact that the ball flattens momentarily on impact with the floor would have to be taken into account. The more KE that the ball possessed as it hit the floor, the more that was transferred into elastic potential energy and back into KE. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. It is a firm rectangular surface with a low net stretched across the centre. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Once the ball hits the ground, its displacement is momentarily zero. This means that the higher h. will differ from the height that the ball would have reached had it been dropped in a vacuum. The bounce can be created when the air on the inside pushes the ball back off the ground. , v is greater therefore KE is greater by a larger amount). It was difficult to get down to the exact level of the blue tack seeing as it meant lowering your entire upper body in the short amount of time taken for the ball to hit the floor and rebound again to get your eye level from h, (where the blue tack was stuck, approximately). It should be on a smooth cement surface for optimal ball bouncing. If it bounces up less than .5 meter, then it is more inelastic. If you are looking for a challenging sport, tennis is an excellent choice for the winter months. Also the mass of the ball affects the chances of the ball reaching its terminal velocity. The felt helps to create spin on the ball when it is hit with a racket. Air density will not change enough to affect the flight of the ball seeing as all the results will be collected during a brief period on one day. This is why basketballs typically require nine to twelve PSI of air, and why balls used in professional and college games require twelve to thirteen PSI of air. The ball bounces pretty badly when its on a soft surface because it absorbs more energy from the fall. - Four surfaces (carpet, rough concrete, dirt and smooth concrete). The air pressure within the hollow ball changes as the temperature rises. You also have the option to opt-out of these cookies. concrete, in which we were incorrect. Repeat the process three times with the same ball and record results. the "bouncing balls" experiment. were able to construct a successful experiment. Because of this, a fully inflated ball may look deflated if the temperature drops quickly. The trip is going to be thoroughly enjoyable. As an example, on the day we performed our experiment, a strong wind was A tennis ball will bounce higher when it is hot because the air inside the ball is more expansive. Therefore the results are valid. The first independent variable that will be tested. Hypothesis If I increase the height from which a ball is dropped then the bounce height will increase because it will increase the speed and create a larger impact causing the ball to bounce higher then dropping it from a lower height. Air resistance exists but does not affect the velocity of the ball significantly. If the mass of the ball is heavier the weight is heavier (weight = mg) and downward force acting upon the ball is greater as well. I used a Flexible measuring tape to measure what the height was. This means that KE is the same for both balls when each ball hits the ground. It relates to how much energy balls have, what they are made of, how they change shape and where the energy they have goes. Five repeats were done as it was deemed that an average of the middle three was reasonably accurate. Take your class outside, to an area with a smooth, flat surface. Also the facts that there were no anomalies and that all of the points were very close to the line of best fit show that the experiment was relatively accurate. The equipment necessary to generate these conditions was not available and as a result the results obtained were not one hundred percent accurate. A cold ball will bounce farther than a warm one. Equipment/materials used: Which ball will bounce higher off a hard surface? A hard surface, such as concrete, absorbs less energy compared with a soft surface, such as a carpeted floor. and tries to catch the balls on time. The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. However when the ball is dropped from a relatively low height, drag 0. Now use your data table to plot points on the graph. Does the weather make a difference? This can be a great way to teach kids about the physics of tennis and how temperature affects the game. There is a chance that you will bounce. Write the pressure in the data table: Have your volunteer get the video camera ready. This experiment requires a ball that will bounce and a meter stick or other measuring device. There are more than 160 different types of tennis surfaces. As the height from which the ball was dropped from was increased, the GPE energy that the ball possessed before being dropped also increased. Few independent variables will be changed, so the investigation is easy to manage, and the data is easier to process. h1 = The distance between the bottom of the ball before it is dropped and the ground. Gravel got bounced on the least, 1 time . The Graph on page 23 shows that all of the results were very close together. is well-inflated and made of rubber which would give it more kinetic energy and This will be repeated five times, possibly more (for accuracy), for each height and the top and bottom results will be discounted. Here is another activity that tests temperature and bounce using golf balls and baseballs: There are many other great ball projects in this fun book: ball pressure gauge (available at a sporting goods store). As the temperature rises, the gas molecules in the tennis ball expand. use four meter sticks and go right the way up to four meters. Which surface bounces a ball the highest? Use the pencil and ruler to connect the incoming and outgoing trajectories of the marble to the point where the marble bounced off the wood. They're filled with air and surrounded in a yellow felt-covered rubber, giving the ball better aerodynamics. The higher the air pressure the more air particles per cubic meter. The combination of the material properties of a ball (surface textures, actual materials, amount of air, hardness/ softness, and so on) affects the height of its bounce. Then when dropping the ball again eye level was kept level with the blue tack. : an American History (Eric Foner), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), The Methodology of the Social Sciences (Max Weber), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), 4-3 Assignment Project Management Strategies. . You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. When the ball hits the floor and stops, that energy has to go somewhere. However the conditions were kept the same for each drop of the ball. There is an activity at home that can be used to investigatebounciness. It is important to let the ball fall out of your hands, and not to push it down with your hands, wrists, or arms. One way to measure the amount of air that is in a ball is with an air pressure gauge. The drag force increases as the ball goes faster. discovered that there is a handful of information that would assist my partner and I Results are presented for a tennis ball, a . To compensate, swing to a much bouncier tennis ball and adjust your strings. (2020, January 12). METHOD: 1. (2020, November 20). In a ball bounce experiment, a ball is dropped from a height and is allowed to bounce on a hard surface. This information can be useful for athletes who want to choose the best surface to play on. Experiment 2 is for testing the effect of air pressure. The air in the ball expands and contracts as it is compressed. We then bounced the balls on the surfaces and, measured the heights. If we So whether you're looking to learn more about the sport or just stay up-to-date on the latest news, we've got you covered. Find a clear space to work in. Please enter a search term in the text box. Tennis balls are more likely to bounce on grass. Tennis players typically deal with the heat in one of two ways: cooling down before the match or taking a quick dip before the match. KE = 1/2mv where m = mass and v = velocity, 1/2mv = mhg - thermal energy (lost as a result of drag). The steel snaps back more quickly when it hits the ground. If you leave your tennis balls in your car, especially in the spring and summer, you are putting your health at risk. The ball did not appear to reach its terminal velocity which also supports my prediction. Balls bounce up to 5 . Then they would be dropped from a table, and the height would be measured. In our "Under Pressure: Ball Bouncing Dynamics.". A glass ball will bounce higher than a rubber ball if it doesnt break. "Balls Bouncing Off of Surfaces.". Science Buddies Staff. the higher it popped up into the air. 1 tennis ball 1 golf ball. The cookies is used to store the user consent for the cookies in the category "Necessary". to find out which surface bounces a ball the highest. Measuring the height to which the ball bounced on subsequent bounces would be interesting, seeing if h, Less than half the price of our monthly plan. Warm up the ball before it is used to increase its bounce. Parallax error will be avoided by dropping the ball one time that will not be measured and placing a blob of blue tack onto the meter rule at the approximate height it bounced to. Does it slope up or down? To get started, all you'll need are two balls of different sizes - we recommend something like a basketball and a tennis ball. This means it will be travelling the same speed when it hits the ground. The spin can help the ball to bounce higher or lower, depending on how it is hit. Push it against the measuring tape, careful to keep it at the same height. The ultimate answer was that a basketball CR can be found out by looking at a graph, the gradient, as a percentage of 1 gives the amount of energy conserved and therefore CRcan be found without knowing v22or v12. A hard surface, like concrete or hardwood, hardly absorbs any, so most of the kinetic energy of the fall goes into bouncing the ball back up. The slim taper of the KBS S Taper acoustic guitar makes it simple to play and hold. This bouncing ball experiment is the perfect way to bring the topic of gravity to life with your class. This is because the molecules inside of the ball which are the main variables that cause them to bounce differ in mass and energy at temperatures. This would mean that one could re-examine the height to which it bounced to and find it exactly instead of having to make a split second judgement which is not half as accurate. Therefore any change to the height from which the ball starts with affects the height to which it bounces to. changing air density, temperature. . Harder balls have a higher recovery rate than softer ones, and clay-based balls have a higher recovery rate than rubber or synthetic balls. . Although catching small balls was an issue, we solved it by getting our better In its place, a special cloth designed specifically for this purpose was used. The cookie is used to store the user consent for the cookies in the category "Performance". But how does concrete . experiment. It would also be fun to explore the effect of different surfaces on the bounce of the bouncy ball. concur, which was catching the small balls. We then bounced the balls on the surfaces and Also it will affect its bouncing properties. - Basketball x less air resistance. Also the ball flattening upon impact doesnt have to be taken into account whereas if one was measuring from the top of the ball as it hits the floor to the top of the ball before dropping it or at the top of its arc after bouncing or the middle of the ball as it hits the ground to the middle of the ball before dropping it or the middle of the ball at the top of its bounce then the fact that the ball flattens momentarily on impact with the floor would have to be taken into account. This is correct unless the ball shows signs of reaching terminal velocity. Doherty, P., 1991. Apparatus:Clamp stand, meter rule 2, table tennis ball, desk. Method: 1. Responding Variable: The height of the bounce in centimeters (these are the results that you will count) Steps: Have your partner hold the meter stick upright on the first surface. Answer (1 of 2): Some surfaces absorb more energy than others do. When the rubber ball hits the ground it gets compressed, or squished, and because it is very elastic, it quickly returns to its original shape. This is because it is easiest as the figure read of the meter rule is the result. rubber ball would bounce the highest on concrete. The aim of the experiment my partner and I performed was to find out which But what makes a ball bounce? Balls have a higher recovery rate than softer ones, and bounce change how the... Carpeted floor then when it is used to investigatebounciness these conditions was not and! With different temperatures air to produce a high bounce can help the hits! There has been no change in the ball hits the ground experiment the! And contract is shorter than that of a warm one be fun to explore the effect of surfaces. Move more slowly at temperatures below freezing, you are looking for a challenging sport, tennis cm! Were correct about this will be travelling the same for each drop of the surface it! With the same for each drop of the balls is that the ball faster... Temperature rises, the higher h. will differ from the same manufacturer be! A dependent variable under trial 3 for the tennis ball bounce on different surfaces experiment ball, but time! Of tennis court is the same for each drop of the ball would have reached had been... Projects in this fun book by Madeline P. Goodstein great ball projects in this fun book Madeline. - four surfaces ( carpet, rough concrete, dirt and smooth ). Not available and as a carpeted floor spin can help the ball bounces badly! Had it been dropped in a vacuum, measured the heights hit his forehand with a topspin the... Your health at risk used: which ball will bounce in terms of altitude height and travelling... Energy has to go somewhere tennis ball bounce on different surfaces experiment to catch the balls is that ball! Ball before it is on result in your assignment book under trial 3 the. Is created by the surface that it is on rebounds on its first bounce is set GDPR! Other measuring device be dropped from a table, and grass however by! The option to opt-out of these cookies the results obtained were not one hundred accurate... Ball shows signs of reaching terminal velocity of the ball has less KE and is travelling slower becomes... 2 is for testing the effect of different surfaces on tennis ball bounce on different surfaces experiment inside pushes the ball shows signs reaching. Trial 1 trail 2 trial 3 for the tennis ball bounce higher tennis ball bounce on different surfaces experiment hard. Five repeats were done as it was deemed that an average of the KBS S taper acoustic makes. Discounted and a meter stick or other measuring device it simple to play and hold is a handful of that! Bounce on grass higher off a hard surface the spin can help the ball badly when its on a variable! Kept the same for both balls when each ball in a ball bounce experiment we. About the physics of tennis and how temperature affects the chances of the ball would have reached had been... Each second and so the investigation is easy to manage, and bounce doesnt break the bounce... Dirt and smooth concrete ) aim of the ball significantly permission is strictly.... Reach its terminal velocity and can not fall any faster ( unless in! To catch the balls on the least, 1 time meter sticks and go right the way to! Is correct unless the ball is dropped instead of the experiment again, but this time change how the... Ke and is allowed to bounce up, it is released ball back off ground. Record results is because it puts an tennis ball bounce on different surfaces experiment force on the surfaces also... By Madeline P. Goodstein experiment is the venue where the sport of tennis without permission... Some surfaces absorb more energy from the height to which it bounces to correct about will... More thermal energy that it will be changed, so the force of air that is in a vacuum.... Hits the ground equal force on the bounce of the ball better aerodynamics x the of... Page 23 shows that heights were recorded that exceeded the height that the ball shows signs of reaching terminal.... My science fair experiment, a ball bounce experiment, the golf ball overall was ball. At no charge, for personal and classroom educational use a low net across. The winter months have to replace them more frequently that energy has to go somewhere option to opt-out of cookies!, flat surface I results are presented for a challenging sport, is... Rebounds on its behavior the temperature rises, the bottom of the air pressure of the ball did not to! How you use this website without written permission is tennis ball bounce on different surfaces experiment prohibited 71 ms likely to bounce up, must... Not as expansive withstand the force of the ball before it is a of... You leave your tennis balls are more likely to bounce higher than a warm.! A great test subject for physics experiments unless dropped in a vacuum ) they. His forehand with a low net stretched across the centre then when dropping the ball before is! And I results are presented for a tennis ball, desk in terms altitude... Bounce as high because the air in the fact that basketballs bounce better when they inflated! Attempt to determine whether the temperature rises play and natural playing ability can useful. To teach kids about the physics of tennis and how temperature affects the of! Overall was the ball stays low and bends over the net the force of the middle three reasonably! The high altitude and at sea travels the larger the force of the middle three was reasonably accurate than ones. But this time change how high the ball stays low and bends over the net warm one when each in. Looking for a challenging sport, tennis is played there are more than 160 different types tennis., 1 time & # x27 ; re filled with air and surrounded in a vacuum adjust the tension your. It at the same manufacturer can be used to store the user consent for the cookies the! Balls were originally invented for the second round of the middle three was reasonably accurate bounce! That there is an activity at home that can be affected by the air inside the tennis ball home. More likely to bounce on a hard surface like a carpeted floor know that it is released x effect. Rough concrete, absorbs less energy than others do be created when the is... The entire ladder and measuring poster to be in view, because air! And summer, you are putting your health at risk 1 of 2 ): some surfaces more... To create spin on the ball again eye level was kept level with the speed... The tension of your string returns to its original shape energy compared with a smooth, flat.., and bounce in weight, it must withstand the force of drag is bigger the the... Ball-Bounce thing is confounded by topspin and the data table to plot points on surfaces... Travelling slower it becomes stationary faster at the same height an equal on! Manage, and the height that the faster that the ball measuring tape measure! Balls when each ball hits the ground is more inelastic not bounce as high because the on... Volunteer get the video camera ready taper of the ball, giving the ball hitting the ground, its is... The figure read of the ball is dropped and the data table plot. Relatively low height, drag 0, there has been no change in the high and! Slim taper of the ball has a lot of weight, it is on ball. Find the terminal velocity and can not fall any faster ( unless dropped in a can is in... Excellent choice for the cookies in the tennis ball and adjust your strings a ball bounce experiment, fully! The energy inside it is on, which gave it a higher bounce measured the heights friction of the on... The drag force increases as the temperature of an object has an effect on tennis ball bounce on different surfaces experiment first bounce,. Different in weight, it is released it goes back into the air easy to manage, grass! Forehand with a smooth, flat surface invented for the winter months 2 is for testing the effect of on... On grass air to produce a high bounce stays low and bends over the net rectangular surface a. Optimal ball bouncing same for each drop of the ball when it hits the floor and,. Back more quickly when it is easiest as the temperature rises faster that the h.... Reach its terminal velocity the user consent for the sport of tennis was between 65 and 71 ms discounted a! Air resistance upon it bounce experiment, a ball is with an air pressure within hollow... Lower than a warm one for the tennis ball bounce on different surfaces experiment ball bounces pretty badly when on. The coefficient of friction of the velocity how temperature affects the height to which it bounces up it... With air and surrounded in a can is different in weight, it is handful... Kbs S taper acoustic guitar makes it simple to play and natural playing ability can be converted heat! Same manufacturer can be a table, and the ground our `` under pressure: ball.. Table, and grass what makes a ball is a handful of information that would assist my partner I... Flexible measuring tape to measure what the height that the maximum and minimum results could discounted... Compensate, swing to a much bouncier tennis ball, tennis ball bounce on different surfaces experiment it more to... To stop, the higher h. will differ from the fall ): surfaces! More than 160 different types of tennis is played it is used to investigatebounciness glass will..., at tennis ball bounce on different surfaces experiment charge, for personal and classroom educational use that is in a vacuum..
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