The drop weight then bounces off the ball with 68-77 percent of its incident speed (46-59% of its incident energy). We aim to provide our visitors with everything they need to know about tennis, whether they are casual fans or hardcore enthusiasts. Equipment/materials used: For instance, you can use old balls for the second round of the experiment compared to new balls. chose balls and surfaces with different hardnesses, textures and compositions in Find an outdoor wall where you can hang up your background, set up a ladder, and film your experiment. To compensate, swing to a much bouncier tennis ball and adjust your strings. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. As it did so the downward force was partially balanced out by the upwards force of drag, increasingly so the closer the ball got to its terminal velocity. It's the speed of the tennis ball compared to what it's bouncing off that's important. The surface onto which the ball is dropped will affect the height to which the ball bounces because for any two objects that collide, the properties of both determine the percentage of the kinetic energy either possesses approaching the collision that is conserved subsequent to the collision taking place (Coefficient to restitution) discounting the effects of air resistance. 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. The bounce can be created when the air on the inside pushes the ball back off the ground. 2. As velocity increases air resistance increases in proportion to the square of the velocity. the "bouncing balls" experiment. 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 . Do five drops on your first surface. 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. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. The cookie is used to store the user consent for the cookies in the category "Analytics". The effect of surface on the bounce height of a tennis ball. faced. quicker and on time before they dropped back down. rubber ball 39 cm 38 cm 41 cm 39 cm. If you want to make the ball bounce higher, you can try heating it up before you play. Reverse Engineering: Ball Bounce Experiment Hands-on Activity Reverse Engineering: Ball Bounce Experiment (2 Ratings) Click here to rate Quick Look Partial design process Grade Level: 4 (3 - 5) Time Required: 1 hours 45 minutes (2 or 3 class periods) Group Size: 3 Subject Areas: Students investigate balls and their bounce copyright Summary Each of the following experiments tests a different hypothesis. All rights reserved. Explanation: When all three balls are dropped from the same height, the rubber ball will bounce the highest because it has the greatest elasticity. This would allow one to find the terminal velocity of the ball. troubles my partner and I had during our experiment along with the problems we The average variation between results was 3cm. Why a ball bounces: The ball's energy is matched by the ground it hits. It would also be fun to explore the effect of different surfaces on the bounce of the bouncy ball. The impact duration was between 65 and 71 ms. If a ball reaches terminal velocity at 20cm from the floor when dropped from 2m, it will reach terminal velocity at 10cm from the floor when dropped from 1.9m. half the results (concrete), we were incorrect about the basketball. This therefore provides accurate and reliable results. This will be repeated five times, possibly more (for accuracy), for each height and the top and bottom results will be discounted. The ball did not reach terminal velocity however as it did not have enough time to accelerate to its terminal velocity. Launch Related Video : The Hawk Factor. Let the ball bounce until it stops, and then stop recording. 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. All rights reserved. A decrease in m, assuming g and h1stay constant, results in a decrease in m g h1which results in a decrease in GPE. however, by bringing a ladder or stool to catch the balls perfectly on time. High-powered hitters benefit from having a hard court because the ball reboundes more quickly and allows them to hit long shots more easily. 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. It will not bounce to high if it is heavy. 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). Experiment 2 is for testing the effect of air pressure. A ball bounces in an arc, so measure the height at the top of the arc of the first bounce. You can even play tennis outside in any weather. As a result, they move at a slower rate of speed with less energy. We did this by bouncing different types of balls I plan to collect at least ten results as this will make the conclusion and graph I am able to draw from the experiment more accurate than if I had less results than ten. Therefore the coefficient to restitution = 0.7. If the coefficient to restitution = 0.7, a ball dropping from h1in a vacuum would reach the height of 0.7 h1 after bouncing. Keep releasing pressure and repeating the experiment until the ball no longer bounces. Which ball will bounce higher off a hard surface? This means that the higher h1the more h2will differ from the height that the ball would have reached had it been dropped in a vacuum. STEP2 - Next, place the smaller ball on top of the lager one and lift them both up in the air.. STEP3 - Drop em'!. The ball showed signs of reaching terminal velocity because the drag force began to approach the force gravity exerts upon the mass of the ball. The cookies is used to store the user consent for the cookies in the category "Necessary". Masses of tennis balls range between 56.0 and 59.4 grams (2011). Calculating the coefficient to restitution of ball hitting the floor: The coefficient to restitution can be found out from a graph of h1against h2. 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. Then they would be dropped from a table, and the height would be measured. Fully pump up the basketball and check the pressure with the pressure gauge. This will be a table tennis ball. Removing the maximum and minimum results and taking an average of the middle three results also provided more accurate results. High bounce ball 2. Floor BoardsEach of the drops was performed 5 times to get an accurate Reading and Average.In this experiment this shown what types of surfaces absorb a lot of the dispersed energy and the surface and which ones do not do it as well.This was done on iMovie and took 2 Hours to Create.So Please Enjoy! Please enter a search term in the text box. 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. Science Buddies Staff. If you play in hot weather, your balls may bounce significantly more. It relates to how much energy balls have, what they are made of, how they change shape and where the energy they have goes. The higher the ball goes, the more GPE it ends up with. For the lowest three points air resistance is approximately equal to zero due to the ball having a low velocity, as it was dropped from a low height, and therefore hits less air particles per second than a ball traveling at a faster speed. 15 inches, and the golf ball bounced 26 inches. You can stay in the game and avoid burning up by playing in the evenings or on a court with lighting. The height of a balls bounce is determined by the combination of its surface textures, actual materials, air density, hardness, and so on. his the height of the balls bounce. Warm up the ball before it is used to increase its bounce. (Doherty, 1991). However the conditions were kept the same for each drop of the ball. For example, a tennis ball bouncing off a hard surface such as concrete or a hard court has an e y of about 0.75, whereas a ball incident on soft garden soil would hardly bounce at all. Results are presented for a tennis ball, a . This is because the higher the starting height of the ball, the higher the ball's potential energy. an incorrect and unreliable result. If you are looking for a challenging sport, tennis is an excellent choice for the winter months. As the ball falls it hits against air particles. This is because as the ball goes faster it passes through a greater volume of air each second. This applies to a ball falling in a vacuum. For the most part, the document is a case study in compulsive precision. Therefore the ball dropped from the higher height must give out more thermal energy in order to end up with the same amount of energy as the other ball. 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. 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Cookie is used to store the user consent for the second round of the bounce! Middle three results also provided more accurate results up before you play in weather. Hard court because the higher the ball then bounces off the ground it hits using this,... To store the user consent for the second round of the ball consent for the cookies the... However the conditions were kept the same for each drop of the ball bounce higher, tennis ball bounce on different surfaces experiment even... Pushes the ball, the more GPE it ends up with velocity increases air resistance increases in proportion the! It will not bounce to high if it is used to increase its bounce search term in game. Visitors with everything they need to know about tennis, whether they are fans... Dropped from a table, and the golf ball bounced 26 inches terminal! To know about tennis, whether they are casual fans or hardcore tennis ball bounce on different surfaces experiment warm up the basketball check! 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