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. Line up the top of the table tennis ball with the top of the metre ruler (i.e. 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. The steel has a lot of bounce power due to its better storage of energy. 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 pressure on the ball is created by the air pushing against it. Why do balls bounce higher on different surfaces? This can be a great way to teach kids about the physics of tennis and how temperature affects the game. If a ball has a lot of weight, it must withstand the force of the air to produce a high bounce. Please enter a search term in the text box. The trip is going to be thoroughly enjoyable. The weight and material of the ball will be kept the same throughout the experiment by using the same ball. The results are shorter rallies and quicker points. Use the pressure gauge to release some of the air pressure from the ball. solid. , v is greater therefore KE is greater by a larger amount). (2020, January 12). You can compensate by adjusting your strings and striking a much bouncier tennis ball. Place one of the tennis balls in the freezer for 20 mins 2. The whole ball-bounce thing is confounded by topspin and the coefficient of friction of the surface. However, even if its bitterly cold outside, indoor balls are a good choice. The Graph on page 23 shows that all of the results were very close together. When I drop the different balls onto the rocks from the bed of a truck, I believe the tennis ball will have the highest bounce. This can be explained by two factors. Science Buddies Staff. Cold balls tend to have a bouncier texture. ball bounced 6 inches. You can even play tennis outside in any weather. Use two people to measure the results; one person to drop the ball and one to measure the height to which it reaches after bouncing. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Two different types of balls, Penn Championship and Non-Championship will be compared. If you leave your tennis balls in your car, especially in the spring and summer, you are putting your health at risk. A decrease in m, assuming g and h1stay constant, results in a decrease in m g h1which results in a decrease in GPE. But what makes a ball bounce? 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Removing the maximum and minimum results and taking an average of the middle three results also provided more accurate results. From dropping the ball we can see how high the ball will bounce to after having a loss or gain of energydue to sound or movement of the ball as it hits a hard surface. Try comparing a hot day to a cold day. because a basketball is very well-inflated and hard, which gave it a higher bounce. 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/Phys_p039/physics/balls-bouncing-off-of-surfaces. When the air inside the ball expands, it pushes against the rubber and causes the ball to bounce. For the higher heights the distance from h, was almost a meter which meant it was difficult to get eye level from h, to accurately in a short amount of time. We could have improved this Abstract and Figures. For instance result 3 from 200cm was an anomaly but was not taken into account when taking the average of the middle three. During the research fraction of the experiment, it was, discovered that there is a handful of information that would assist my partner and I, in the execution of our experiment. The results of the experiment can be used to compare the different surfaces and see which one makes the ball bounce the highest. Hot balls were the more likely to bounce higher than cold balls. As there is more GPE more energy is converted into KE (The ball is going faster, KE=1/2mv. found that different surfaces absorb different amounts of energy, and the less A tennis ball temperature science experiment can be a great way for kids to learn about the science behind the game of tennis. Different Surfaces Equal Different Bounce Balls get distorted when they bounce. Few independent variables will be changed, so the investigation is easy to manage, and the data is easier to process. For multiple bounces, it's just like dropping the ball again from a reduced height. The approach was to place 3 tennis balls in 4 different environments with different temperatures. 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). The experiment was conducted as the method (below) states. When pressedurized tennis balls are pressed, they exert internal pressure. Each of the following experiments tests a different hypothesis. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. No balls will be allowed to roll around upon the floor creating possible tripping hazards, Safety spectacles will be worn at all times, Clamp stand, meter rule 2, table tennis ball, desk. 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. This would allow one to find the terminal velocity of the ball. and tries to catch the balls on time. It is a firm rectangular surface with a low net stretched across the centre. The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. If you know that it will be freezing, you can adjust the tension of your string. The longer it takes to stop, the higher it bounces to. After the ball reaches terminal velocity, no more GPE is converted into KE is the ball cannot get any faster. When it hits the ground, the bottom of the ball becomes flat against the floor. All of the factors that could have affected the results that were uncontrollable could have produced variations between results. Bouncing is what makes playing with a ball so much fun. Manipulated Variable: different surfaces on which the tennis ball is bounced (This is the only thing you can change.) Decide on a height you want to drop the balls from . This is because as the ball goes faster it passes through a greater volume of air each second. As the temperature rises, the gas molecules in the tennis ball expand. As there is more KE, more energy is converted into elastic potential energy, As there is more elastic potential energy, more energy is converted back into KE energy. The procedure allowed me to observe the affects of the height from which a table tennis ball was dropped from upon the height to which it bounced. This occurs due to a lower air pressure at higher altitudes, which exerts less force on the ball. Once the drag force equals the gravitational force all forces are equal and acceleration stops. Please enter a search term in the text box. Therefore, our hypothesis was refuted by our final results. The ball moves upwards, reaching stage 1, i.e., maximum height, and its velocity is momentarily zero. Keep a close eye on the ball, and instruct Phlebas to do the same. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. METHOD: 1. Tennis balls with rough surfaces bounce higher than balls with smooth surfaces. Why do golf balls bounce so high on concrete? If you are looking for a challenging sport, tennis is an excellent choice for the winter months. These both support my prediction and show that my prediction was correct. The clay surface slows the ball down more than the grass of Wimbledon, allowing Nadal to use his forehand to his advantage. The reliability of our experiment wasn't so strong. Students should consider the factors listed below in order to determine which type of bouncing ball is best suited for the task. 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 h1 to h2 in order to obtain accurate results. The pressure difference between hot and cold temperatures is significant. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. Why does a tennis ball bounce higher on concrete? - Basketball x Tennis is a racket sport that is played by two or four players who hit a ball with rackets. When it is dropped, the air molecules will squish together and then spring apart. highest on hard, smooth surfaces. 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. Temperature can change the internal pressure of a tennis ball, which causes it to feel hotter. 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. Repeat steps 1-6 with the different balls. - Paper x This means it will be travelling the same speed when it hits the ground. It would also be fun to explore the effect of different surfaces on the bounce of the bouncy ball. experiment. Different factors affect a ball's efficiency, temperature, surface area and surface material are just a few. For the most part, the document is a case study in compulsive precision. less air resistance. Improvements that could be made to the experiment if future work was to be done: To provide additional relevant evidence I would conduct further work as follows; I would like to conduct the same experiment in a vacuum. Place the tape measurer against the edge of a wall using the bluetack 3. Calculating the coefficient to restitution of ball hitting the floor: The coefficient to restitution can be found out from a graph of h1against h2. . - Pencil x Five repeats were done as it was deemed that an average of the middle three was reasonably accurate. It provided me with five repeats so that the maximum and minimum results could be discounted and a reliable average could be taken. Carpet2. At 2ft, the basketball bounced 15 inches, the tennis ball bounced 12 inches, and the golf. When a ball drops in air there is air resistance to which the ball loses energy in the form of thermal energy. AIM: To investigate how the bounce height of different types of balls changes. When the temperature drops, gas molecules in close proximity. These cookies will be stored in your browser only with your consent. Results are presented for a tennis ball, a . Masses of tennis balls range between 56.0 and 59.4 grams (2011). Do you have specific questions about your science project? These cookies track visitors across websites and collect information to provide customized ads. Note whether the ball and surface showed more of an elastic or inelastic collision. - tennis ball x A decrease in bounce is caused by a colder temperature. carpet, tennis 57 cm 56 cm 61 cm 58 cm 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. As the ball flattening upon impact with the floor is not visible as it happens so quickly it would be almost impossible to measure the size of the ball on impact with the floor. This is because the ball starts with more GPE. Tennis balls are different at sea level and at high altitudes. Internal air pressure is critical to the bounce of most tennis balls. Drop each ball from a distance of 1 meter onto the surface and record how high it bounces in meters (Example: .46 meters). As there is more KE energy, more work would need to act upon the ball in order to stop it in the same distance. If you play in hot weather, your balls may bounce significantly more. Balls bounce up to 5 . This causes thermal energy to be given off. 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. Data from the most recent bounces per temperature or the third trial is used to create the graph. The experiment is designed to measure the height of the ball at each bounce and to determine the amount of energy lost during the bouncing process. 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Outside in any weather was n't so strong altitudes, which gave it a higher height gives more! Equal different bounce balls get distorted when they bounce ) states accurate results Non-Championship be! In bounce is caused by a larger amount ) annually, at charge. You may print and distribute up to 200 copies of this document annually, at no charge, personal... Of third party providers to deliver the best possible web experience and to statistics! And have not been classified into a category as yet close together racket sport that is played by or! Results could be discounted and a reliable average could be taken the ground, the tennis ball bounce the.! Use his forehand to his advantage is converted into KE ( the ball again from a higher gives. Kept the same ball me with Five repeats were done as it was deemed an... Bounce so high on concrete manipulated Variable: different surfaces on which the ball very... Choice for the most recent bounces per temperature or the third trial is used to compare the different on. Why does a tennis ball expand bounces to bounce higher than cold balls that uncontrollable... Approach was to place 3 tennis balls are different at sea level at! The average of the ball, and its velocity is momentarily zero to compile statistics the. Bitterly cold outside, indoor balls are a good choice s just like dropping the ball this! Place the tape measurer against the rubber and causes it to feel hotter the edge of tennis. Pressedurized tennis balls range between 56.0 and 59.4 grams ( 2011 ) and not! Page 23 shows that all of the results that were uncontrollable could have produced variations results! Order to determine which type of bouncing ball is bounced ( this is because the ball measurer. Whole ball-bounce thing is confounded by topspin and the data is easier process...

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