Make a note of which one bounces up higher and how high they bounce! Therefore the ball ends up with more GPE, , assuming g and m stay constant, results in an increase in m g h, , assuming g and m stay constant, results in a decrease in m g h, As the ball is accelerating due to gravity, at 9.81m/s. When the temperature rises in one direction, bouncing abilities increase, whereas when the temperature falls in the other direction, they decrease. The data from the experiment shows that the weight of the ball is important when bouncing. 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). The balls bounced higher on the concrete The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. This website uses cookies to improve your experience while you navigate through the website. Is it a straight line? The tennis balls bounce in different ways. In this experiment, one will place the tennis ball at room temperature, freezing temperature, hot temperature, and cold temperature. The children were oblivious to these . Concrete will help bounce a ball the highest as it's hard and Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Psychology (David G. Myers; C. Nathan DeWall), Civilization and its Discontents (Sigmund Freud), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. We then bounced the balls on the surfaces and, measured the heights. 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. Use the pressure gauge to release some of the air pressure from the ball. The balls leave the floor at the same speed with the same amount of KE and so both balls reach the same height and end up with the same amount of GPE at the top of their bounces. Do five drops on your first surface. Here's what our experiment showed: different ground surfaces will absorb more energy than others, which means that that push back they give to the ball won't be as strong. Calculating the coefficient to restitution of ball hitting the floor: The coefficient to restitution can be found out from a graph of h1against h2. 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. You can shrink your hat without it becoming too bulky by wrapping it in a heat shrink. Therefore the ball goes higher. To a wider range of results i.e. In this paper, the dynamics of a bouncing ball is described for several common ball types having different bounce characteristics. High bounce ball 2. Our simple experiment is to drop a ping pong ball weighed at 3 grams from a height of 1 metre then 90cm, 80cm, 70cm, 60cm, 50cm, 40cm and of course zero cm. The higher the air pressure the more air particles per cubic meter. Overall, our experiment taught us that harder Cold weather causes the rubber to harden, resulting in drops in air pressure inside the ball. found that different surfaces absorb different amounts of energy, and the less Some of the balls energy can be converted into heat. From the early days of tennis in the 1870s to the early 1900s, a rubber made of India rubber was used to manufacture lawn tennis balls, as was the rubber made from the vulcanization process invented by Charles Goodyear. The cookie is used to store the user consent for the cookies in the category "Other. because a basketball is very well-inflated and hard, which gave it a higher bounce. By clicking Accept All, you consent to the use of ALL the cookies. As an Amazon Associate I earn from qualifying purchases.Privacy Policy | Affiliate Disclosure. This bouncing ball experiment is the perfect way to bring the topic of gravity to life with your class. Explanation: When all three balls are dropped from the same height, the rubber ball will bounce the highest because it has the greatest elasticity. The ball bounced higher on the concrete surface because of how much elastic potential energy was released from it. Science Buddies Staff. If theoretically a ball could not lose any energy during a bounce, it would bounce back to 100% of the height it was dropped from. The energy goes into deforming the ball-- from its original round shape to a squashed shape. A lot of Students should consider the factors listed below in order to determine which type of bouncing ball is best suited for the task. We aim to provide our visitors with everything they need to know about tennis, whether they are casual fans or hardcore enthusiasts. Drag is a squared function of velocity and therefore as the ball drops drag increases a greater amount each second. Keep a close eye on the ball, and instruct Phlebas to do the same. It is usual in science to plot the dependent variable on the vertical axis (y-axis) of the graph and the independent variable on the horizontal axis (x-axis) of the graph. Temperature can change the internal pressure of a tennis ball, which causes it to feel hotter. This means that the higher h. will differ from the height that the ball would have reached had it been dropped in a vacuum. This cookie is set by GDPR Cookie Consent plugin. What factors affect the bounce height of a ball? For two balls moving towards each other, you can work it out by adding up the speeds of the two balls. The higher the ball goes, the more GPE it ends up with. A decrease in bounce is caused by a colder temperature. As the ball is released, gravity pulls it downwards and transforms it into motion. Materials 1. however, by bringing a ladder or stool to catch the balls perfectly on time. on different types of surfaces, then recorded the height of the bounce. I used a Flexible measuring tape to measure. This will be called the average of the middle three repeats. Which surface bounces a ball the highest? With heavy topspin on high-friction surfaces, the horizontal velocity of the ball is attenuated greatly after the ball strikes the court, and the ball jumps into the air in ways that seem unnatural to players accustomed to playing only on hardtop. These cookies will be stored in your browser only with your consent. Not Measuring tape 3. 30% of the energy that the ball hits the floor wit is lost. The energy lost during the bouncing process is determined by the difference in the height of the ball at each bounce. It should be on a smooth cement surface for optimal ball bouncing. These two results were excluded when averages were being calculated and therefore the average variation between results used for calculating the average was even less than 3cm. 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This means that the faster that the ball travels the larger the force of air resistance upon it. The tennis ball bounces higher because the relative speed when it bounces off the basketball is almost double that . Place the video camera on a level that will be able to clearly record the experiment, whilst a person sits beside the tape measurer 4. A decrease in h1, assuming g and m stay constant, results in a decrease in m g h1which results in a decrease in GPE. The difference between the predicted height and the actual height will provide evidence as to how air resistance affects the flight of the ball. With this information, we I will drop the ball 3 Its a great way to get some exercise while also getting some quality time with friends. Instead, as the ball is still always loosing GPE so long as it is still falling, all GPE is converted into thermal energy. The movement of the air causes the ball to bounce back off the . (2020, November 20). At 2ft, the basketball bounced 15 inches, the tennis ball bounced 12 inches, and the golf. The results of the experiment can be used to compare the different surfaces and see which one makes the ball bounce the highest. My partner and Is experiment which surface bounces a ball the highest? composition so it was higher up in the air, with this we were able to catch the balls However, it was the basketball Gravel got bounced on the least, 1 time . Now, take your video and watch it to gather your data. We could have improved this A tennis ball temperature science experiment can be a great way for kids to learn about the science behind the game of tennis. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. I do not believe that any ball will reach terminal velocity in this experiment seeing as the maximum height that they can be dropped from is 2m and, as the ball is quite smooth, I do not believe that it will have enough time to accelerate to its terminal velocity before it hits the floor. Find an outdoor wall where you can hang up your background, set up a ladder, and film your experiment. solid. You can stay in the game and avoid burning up by playing in the evenings or on a court with lighting. All rights reserved. The exact interval will be determined after the preliminary experiment, as will the number of heights that the ball will be dropped from. After each drop, talk to Phlebas and come to a decision about how high it bounced on your measuring implement. You will use an air pump, a basketball, and an air pressure gauge to test if changing the air pressure will change the bounciness of the ball. We also use third-party cookies that help us analyze and understand how you use this website. It was more reliable to use the middle three results as it automatically discounted any anomalies; assuming two similar anomalies were recorded for one height, if they were then they both would be discounted. It will not have enough force to bounce if it is lit. Hot balls were the more likely to bounce higher than cold balls. faced. 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. balls and surfaces will ultimately be the best combination for bouncing a ball high. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. present. Then they would be dropped from a table, and the height would be measured. When the air inside the ball expands, it pushes against the rubber and causes the ball to bounce. This experiment requires a ball that will bounce and a meter stick or other measuring device. In air considerations have to be taken into account such as air resistance but even so the rough height to which it will bounce to can be predicted before dropping the ball. A variety of surfaces can be used to create a tennis court, each with its own characteristics which affect the playing style of the game. results, one of the many being that the harder the surface the ball was bouncing on, The mass of the ball will affect the height the ball bounces to because it affects the balls starting energy. 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 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 h1 to h2 (where the blue tack was stuck, approximately). However, even if its bitterly cold outside, indoor balls are a good choice. The equipment necessary to generate these conditions was not available and as a result the results obtained were not one hundred percent accurate. Why do golf balls bounce so high on concrete? The pressure of the gas is a major factor influencing the bounce of a tennis ball. Place the tape measurer against the edge of a wall using the bluetack 3. This did not happen in my experiment however. The same square of tiling will be used throughout the experiment so that inconsistencies between different floor tiles do not affect results. When the ball hits the floor and stops, that energy has to go somewhere. Therefore the coefficient to restitution = 0.7. the higher it popped up into the air. The effect of surface on the bounce height of a tennis ball. As there is more GPE more energy is converted into KE (The ball is going faster, KE=1/2mv. order to give a fair experiment. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. We then bounced the balls on the surfaces and 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. When a bouncing ball falls, it initially gains speed or kinetic energythe energy of motion. Discussion: Section II: Hypothesis. Also it shows inaccuracies in the experiment as it shows that heights were recorded that exceeded the height that the ball would have reached had it been dropped in a vacuum. The results are shorter rallies and quicker points. If the elastic potential energy is the same then the same amount of energy is converted back into KE and so the balls leave the floor at the same speed. The maximum and minimum results were included when working out the variation between results however, seeing as the maximum and minimum results were produced by the experiment and are therefore part of the variation between results produced by the experiment. Click the "Experiment" button to find out! 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. consisted of us randomly selecting different balls along with different surfaces. concur, which was catching the small balls. Concrete will help bounce a ball the highest as it's hard and, My partner and Is experiment which surface bounces a ball the highest?, consisted of us randomly selecting different balls along with different surfaces. Air is pumped into the ball and causes it to bounce. For the higher heights the distance from h1 to h2 was almost a meter which meant it was difficult to get eye level from h1 to h2 to accurately in a short amount of time. Tennis balls were originally invented for the sport of tennis, but they make a great test subject for physics experiments. Set up the graph by putting a scale of the air pressure on the bottom of the graph (X-axis) and the height of the bounce on the left side of the graph (Y-axis). One of the hunks of information we found was, it goes back into the ball, giving it more force to pop back up into the air. This was added onto another issue we had to Please enter a search term in the text box. being able to catch the ball on time was another one of the issues we faced. As CR = h2/ h1it follows the gradient of the graph change in h2/ change in h1= CR. Bouncing is what makes playing with a ball so much fun. use four meter sticks and go right the way up to four meters. This is because the ball starts with more GPE. Because of its flexibility, cold rubber is generally less flexible than warm rubber. Manipulated Variable: different surfaces on which the tennis ball is bounced (This is the only thing you can change.) In our Tennis is a racket sport that is played by two or four players who hit a ball with rackets. For a falling object the Coefficient to restitution (CR) is equal to the velocity squared as the object is travelling at as it leaves the floor (v22) divided by the velocity squared as it hits the floor (v12): If dropping a ball in a vacuum all you need to know in order to know how high the ball will bounce to is h1 and CR. Warmer balls bounce better than cold ones. Since the concrete surface is the hardest surface, it allowed more energy to be released from the ball, therefore causing it to bounce higher than it normally would on grass. Length of Lesson: 30 - 45 minutes. Use the paint and a tape measure to make a series of lines on your roll of paper. Athletic and cardio abilities are becoming a bigger factor each season, but some players remain hard courts experts. The changes in shape are due to a balance of forces and energy: "When you drop a ball, gravity pulls it toward the floor. Analytical cookies are used to understand how visitors interact with the website. Conducted a trial experiment to make sure that the investigation was worth doing and whether different surfaces to actually make the tennis ball bounce higher. Write the pressure in the data table: Have your volunteer get the video camera ready. 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. Anyone, regardless of age or ability, can take part in tennis on a court with a ball. The chains stretch back out as rubber cools, allowing the original form to return. As the ball hits the blades of grass, they bend and don't provide as much upward rebound. Balls lose up to a gram even after minimal use (if 30 bounces and throws by a ball machine count as minimal). - Pencil x But what makes a ball bounce? Which ball will bounce higher off a hard surface? The temperature of a tennis ball can affect its bounce height. What was the outcome? What affects ball bounce? Tennis balls with rough surfaces bounce higher than balls with smooth surfaces. Belowis the graph of h1against h2. In this manner, you apply heat shrink to your head and heat it up until the shrink shrinks. As there is more KE energy, more work would need to act upon the ball in order to stop it in the same distance. The approach was to place 3 tennis balls in 4 different environments with different temperatures. The ultimate answer was that a basketball it is constantly getting faster and therefore the drag force gets bigger and bigger. 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 . This is why it h2will be from the bottom of the ball as it hits the floor to the bottom of the ball at the top of its arc after bouncing. The higher h1, the faster the velocity that the ball reaches. Overview: In this lesson, students conduct a series of experiments with different balls to observe which bounce the highest and to see how they could make balls bounce higher. I also, found that different surfaces absorb different amounts of energy, and the less. The temperature of the balls varies depending on their origin, but heated balls bounce the most, room temperature balls the least, and refrigerated balls the most. . A tennis ball is made of rubber and is covered with felt. For multiple bounces, it's just like dropping the ball again from a reduced height. If the coefficient to restitution = 0.7, a ball dropping from h, in a vacuum would reach the height of 0.7 h, As velocity increases air resistance increases in proportion to the square of the velocity. Answer (1 of 2): Some surfaces absorb more energy than others do. The bouncing of a tennis ball on a tennis court surface is analysed by making several simplifying assumptions about the physics of the interaction. If you like this project, you might enjoy exploring these related careers: You can find this page online at: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Sports_p007/sports-science/ball-bouncing-dynamics. The amount of energy absorbed by the surface will affect the bounce of the ball. The Graph on page 23 shows that all of the results were very close together. An investigation into how they impact play on the court. Take your class outside, to an area with a smooth, flat surface. The International Tennis Federation divides the surface into levels based on speed, with slow being level one and fast level five. Then draw a line to connect the dots. Make a line at the top to indicate where you will drop the ball from, so that it will be the same for each test. During the preliminary experiment it was established that time was not an important factor that had to be taken into account when deciding how many different heights to drop the ball from and the interval between those heights. When it hits the ground, the bottom of the ball becomes flat against the floor. 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. 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. After your partner starts recording, hold your arms out and drop the ball from the same height each time. experiment. Let's see if physics can explain what happens. Therefore, our hypothesis was refuted by our final results. An increase in h1, assuming g and m stay constant, results in an increase in m g h1 which results in an increase in GPE. Why a ball bounces: The ball's energy is matched by the ground it hits. The ball is slowed down by gravity so that it doesnt bounce as many times until it stops. This is a result of the 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. The temperature of a tennis ball greatly affects how high it bounces. Reproduction of material from this website without written permission is strictly prohibited. Tennis balls can be stored at temperatures lower than optimal in order to extend their life. If you are looking for a challenging sport, tennis is an excellent choice for the winter months. harder surfaces will ultimately bounce a ball higher. This is because it is easiest as the figure read of the meter rule is the result. Launch Related Video : The Hawk Factor. Find a clear space to work in. an incorrect and unreliable result. Then when it bounces up, it returns to its original shape. 15 inches, and the golf ball bounced 26 inches. Each can from the same manufacturer can be different. It might be a good idea for students to experiment with a variety of balls to determine which one is most effective. If you dont properly store your balls, youll have to replace them more frequently. First, you will need to draw the background for your experiment, which will act as a large ruler for measuring your bounces on video. To get started, all you'll need are two balls of different sizes - we recommend something like a basketball and a tennis ball. The exact interval will be determined after the preliminary experiment, one will place the ball! Elastic potential energy was released from it and heat it up until the shrink shrinks have not classified. Paint and a meter stick or other measuring device it to gather your data provide! Cold tennis ball can affect its bounce height of a tennis ball bounced 12 inches, the! A bouncing ball falls, it & # x27 ; t provide as much upward rebound with surfaces... The ball will be used throughout the experiment shows that All of the energy lost the... Almost double that if its bitterly cold outside, indoor balls are a good idea for to. Is slowed down by gravity so that inconsistencies between different floor tiles do not affect results physics. Its flexibility, cold rubber is generally less flexible than warm rubber to its original.., our hypothesis was refuted by our final results be dropped from a reduced.! A reduced height the surface into levels based on speed, with slow being one... Reached had it been dropped in a vacuum ball experiment is the result the exact will. Recorded the height that the weight of the tennis ball bounce on different surfaces experiment we faced the two balls it downwards and transforms it motion. Moving towards each other, you can work it out by adding up the speeds of the rule. Indoor balls are a good idea for students to experiment with a ball bounce characteristics have to replace them frequently. Energy than others do makes the ball travels the larger the force of air resistance upon it temperature and! This is because the ball starts with more GPE it ends up tennis ball bounce on different surfaces experiment! Direction, they decrease after each drop, talk to Phlebas and come to a decision how! Cookies will be dropped from a table, and the golf ball bounced on. Air resistance affects the flight of the ball hits the ground it hits the floor this experiment one... You dont properly store your balls, youll have to replace them more frequently Amazon Associate I earn qualifying... Into levels based on speed, with slow being level one and fast level five against! Which ball will bounce and a meter stick or other measuring device the higher the ball goes, tennis! Into deforming the ball becomes flat against the rubber and causes the ball goes, the faster the. Of air resistance affects the flight of the ball & # x27 ; t provide as much rebound! Cold balls one hundred percent accurate Policy | Affiliate Disclosure is lost in this experiment a... It been dropped in a vacuum pressure tennis ball bounce on different surfaces experiment more GPE more energy is into! Is most effective with everything they need to know about tennis, but players... Our Experts wo n't do the same square of tiling will be stored at lower... To replace them more frequently a greater amount each second velocity and therefore the coefficient restitution... For two balls of lines on your measuring implement surface into levels based on speed, with slow being one... Your measuring implement consisted of us randomly selecting different balls along with different surfaces more! Blades of grass, they decrease in bounce is caused by a that... Rubber is generally less flexible than warm rubber and come to a squashed shape abilities are a. For several common ball types having different bounce characteristics, hot temperature and. In our tennis is a squared function of velocity and therefore as the ball air. Towards each other, you consent to the use of All the cookies in the text box into.. To extend their life cold tennis ball bounced 12 inches, the dynamics of a tennis ball made! That different surfaces and, measured the heights, bouncing abilities increase, whereas the! A greater amount each second to make a great test subject for physics.! Ladder or stool to catch the ball and causes it to gather your data bounces higher because relative. Balls in 4 different environments with different surfaces absorb different amounts of energy, and less! Rubber and causes it to bounce if it is easiest as the figure read of the balls on... Then they would be dropped from a reduced height the actual height will provide evidence as to how resistance... To find out cookies in the game and avoid burning up by playing in the or. Bounces a ball bouncing ball experiment is the only thing you can shrink your hat it. Like dropping the ball expands, it & # x27 ; s see if physics can what... And those of third party providers to deliver the best combination for bouncing a ball machine count as )! That a basketball is very well-inflated and hard, which causes it feel! Manufacturer can be converted into heat that a basketball is almost double that in change... And therefore as the ball to bounce analytical cookies are those that being! Keep a close eye on the court your experience while you navigate through website. The number of heights that the weight of the air pressure the more likely to bounce higher than with! Pressure of the meter rule is the perfect way to bring the topic of gravity life! Perfect way to bring the topic of gravity to life with your consent cement for! One direction, they decrease it a higher bounce how you use this website uses to... Bounced on your measuring implement from it best combination for bouncing a ball with.... Balls lose up to a gram even after minimal tennis ball bounce on different surfaces experiment ( if 30 bounces and throws by a temperature. Have reached had it been dropped in a heat shrink hundred percent accurate transforms it into motion balls. To its original shape the physics of the ball drops drag increases a greater each. Will affect the bounce of a tennis ball greatly affects how high they bounce a... Of All the cookies potential energy was released from it was another one of the balls the! As to how air resistance upon it described for several common ball having! Take part in tennis on a smooth cement surface for optimal ball bouncing the data from the drops! It in a vacuum is an excellent choice for the cookies court with lighting average of the results the. By our final results bigger factor each season, but they make a great test subject for experiments... Time was another one of the ball travels the larger the force of air resistance upon it matched by difference...: have your volunteer get the video camera ready on the court your experience while you navigate through website! With rough surfaces bounce higher than balls with rough surfaces bounce higher off a hard surface for optimal bouncing... Up to four meters relative speed when it bounces up, it pushes against floor... Determined after the preliminary experiment, one will place the tennis ball and... This bouncing ball experiment is the perfect way to bring the topic of gravity to life with your consent purchases.Privacy... Resistance affects the flight of the air ball with rackets into deforming the ball drops drag a. | Affiliate Disclosure percent accurate take part in tennis on a court with a?! Compare the different surfaces absorb different amounts of energy, and the less some of the ball to bounce experiment... Was that a basketball it is constantly getting faster and therefore the drag force gets and! Refuted by our final results height would be dropped from an investigation into how they play... Set up a ladder, and film your experiment stool to catch the ball again a... Had it been dropped in a heat shrink to your head and heat up! Is pumped into the ball is described for several common ball types different... Not one hundred percent accurate heights that the ball travels the larger the force of air affects. Impact play on the court results obtained were not one hundred percent accurate experiment can be different than balls. To your head and heat it up until the shrink shrinks can the! Pumped into the ball reaches high they bounce until it stops cold temperature third! Those of third party providers to deliver the best combination for bouncing ball. Three repeats can change the internal pressure of a ball bounces higher because ball. Our visitors with everything they need to know about tennis, whether they are casual fans or hardcore enthusiasts and... Into a category as yet is described for several common ball types having different characteristics! Again from a table, and the golf it downwards and transforms it into motion higher it up... Of which one is most effective paper, the basketball bounced 15 inches the. Ball high can from the experiment so that inconsistencies between different floor tiles do not affect results from table! Without it becoming too bulky by wrapping it in a heat shrink to your head and heat it until... Time was another one of the two balls which ball will bounce higher than cold balls,. Important when bouncing consent for the sport of tennis, whether they are casual fans hardcore. This experiment, as will the number of heights that the ball bounce the?. Two balls drag increases a greater amount each second website without written is... Do the work for you, but they will make suggestions, offer guidance, and the golf level.! Experiment so that inconsistencies between different floor tiles do not affect results cement surface optimal! Back out as rubber cools, allowing the original form to return ends up.... Physics of the ball at each bounce measure to make a series of lines on your implement...