I'm a semi-professional tennis player for 15 years, and I can clearly claim that tennis court is my 2nd home. will start at 2m and then move down in intervals of 10cm to 10cm. This information can be useful for athletes who want to choose the best surface to play on. The coefficient to restitution can be found out from a graph of, it follows the gradient of the graph change in h. . SCIENTIFIC Method Aim & Hypothesis Method Variables Risk Assessment Results Conclusion & discussion hard ball made of rubber should bounce the highest on a concrete surface, which This is because the experiment is a very short and simple one to carry out and if conducted efficiently can be completed easily within the time span allowed for collecting evidence. The more energy that the ball possessed before being dropped, the more energy was converted into KE while the ball fell. Method:The apparatus will be set up as shown: H is the height of the ball before it is dropped. The Modus 120 pickup enables you to produce some of the most amazing sound combinations. that when a ball hits a surface, all its kinetic energy has to go somewhere. 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. Science Buddies Staff. 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. It might be a good idea for students to experiment with a variety of balls to determine which one is most effective. Easy Experiment This scientific mystery can be demonstrated at home or school with a simple experiment. quicker and on time before they dropped back down. If you dont properly store your balls, youll have to replace them more frequently. Our team of volunteer scientists can help. The average variation between results was 3cm. Line up the top of the table tennis ball with the top of the metre ruler (i.e. Hypothesis: if different balls are bounced on different surfaces, then a rubber ball The ball bounced higher on the concrete surface because of how much elastic potential energy was released from it. Place the tape measurer against the edge of a wall using the bluetack 3. As in both cases the main form of energy is GPE it follows that the higher the ball is dropped from, the higher the ball will bounce. The exact interval will be determined after the preliminary experiment, as will the number of heights that the ball will be dropped from. 2. The ball feels softer on the hand, but much harder on impact, resulting in a very different type of tennis. or carpet. Experiment 2 is for testing the effect of air pressure. Will the air pressure change the bounciness of a ball? In our 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. Copyright 2002-2023 Science Buddies. = The distance between the bottom of the ball before it is dropped and the ground. September 28, 2022 by George Jackson. 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. From the above table it can be seen that there were inaccuracies in the experiment. 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. The Racquet Sports Industry's website states that, like human fingerprints, no two balls seem to be alike, and each has slightly different bouncing ability. Try comparing a hot day to a cold day. When the temperature is below 68 degrees, the ball will bounce less. hypothesis, we predicted that a rubber ball would bounce the highest on rough Balls bounce differently on different axes. I think this is A glass ball will bounce higher than a rubber ball if it doesnt break. This means that the faster that the ball travels the larger the force of air resistance upon it. The energy chain is as follows: Therefore as energy cannot be created or destroyed the energy the ball starts with must be directly proportional to the energy the ball finishes with, at the top of its bounce, and so if the ball starts with more energy it must therefore finish with more. (2020, November 20). All rights reserved. Conclusion: less air resistance. The changes in shape are due to a balance of forces and energy: "When you drop a ball, gravity pulls it toward the floor. The ball bouncing on a hard surface travels further and faster than the ball bouncing on a grass surface, which is why youll see professional tennis players playing on hard courts in cold weather. Warmer balls bounce better than cold ones. Leave the tennis balls in place for at least one to three hours, if possible. Such an impact compresses the ball 1.4-1.6 inches, or about 54-62% of its diameter. This occurs due to a lower air pressure at higher altitudes, which exerts less force on the ball. In this paper, the dynamics of a bouncing ball is described for several common ball types having different bounce characteristics. Height the ball bounced to (average of middle three) when dropped from: 10cm = 6.7 6.7 = 66% of 10 (to the nearest percent), 20cm = 14.0 14.0 = 70% of 20 (to the nearest percent), 30cm = 22.3 22.3 = 74% of 30 (to the nearest percent). The only difference between the balls is that the ball dropped from a higher height gives out more thermal energy. Internal air pressure is critical to the bounce of most tennis balls. The ball shoots up with less energy because of this. 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. 30% of the energy that the ball hits the floor wit is lost. The felt helps to create spin on the ball when it is hit with a racket. Why do marbles bounce so high? The amount of energy absorbed by the surface will affect the bounce of the ball. Make a line graph of your data. Try comparing two days with different atmospheric pressure. This website uses cookies to improve your experience while you navigate through the website. If you play in hot weather, your balls may bounce significantly more. These cookies ensure basic functionalities and security features of the website, anonymously. Tennis is a racket sport that is played by two or four players who hit a ball with rackets. But how does concrete . Now use your data table to plot points on the graph. This is because it is easiest as the figure read of the meter rule is the result. An increase in m, assuming g and h1stay constant, results in an increase in m g h1 which results in an increase in GPE. As the ball is released, gravity pulls it downwards and transforms it into motion. - Pencil x This means it will be travelling the same speed when it hits the ground. Tennis, a game that has existed in the world for centuries, has been popular all over the world. As a result, the balls bounce decreases as pressure decreases. Therefore the ball goes higher. The ball weighs exactly 2.5g. The more particles per cubic meter, the more drag acting upon the ball. We then bounced the balls on the surfaces and, measured the heights. Which ball will bounce higher off a hard surface? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Use the pressure gauge to release some of the air pressure from the ball. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. Let the ball bounce until it stops, and then stop recording. Its not just a game for the wealthy; its also a game for everyone. This would allow the actual coefficient to restitution to be calculated. Therefore the heavier the ball is, the faster its terminal velocity. A lot of A similar length stick, marked in 5-10cm bands of colour. Science Buddies Staff. This means that the faster that the ball travels the larger the force of air resistance upon it. Is it a straight line? Because of the pressure inside the tennis ball, it is how high the ball will bounce in terms of altitude. In this manner, you apply heat shrink to your head and heat it up until the shrink shrinks. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. As a result, they move at a slower rate of speed with less energy. If you string your racket 2 pounds lower in the winter, it will bounce more. it is constantly getting faster and therefore the drag force gets bigger and bigger. will differ from the height that the ball would have reached had it been dropped in a vacuum. Apparatus:Clamp stand, meter rule 2, table tennis ball, desk. However, it was the basketball The temperature of a hollow ball influences the amount of air in the chamber. A cold tennis ball will not bounce as high because the air inside the ball is not as expansive. The results of the experiment were obtained with a method that ensured that every drop was under similar conditions which ensured a fair test. This cookie is set by GDPR Cookie Consent plugin. Although we had all these challenges, High-powered hitters benefit from having a hard court because the ball reboundes more quickly and allows them to hit long shots more easily. Bouncing is what makes playing with a ball so much fun. My partner and Is experiment which surface bounces a ball the highest? The tennis balls bounce in different ways. The harder the court surface is, the higher the rebounded ball will be. Different courts are better suited to each players style. This can be a great way to teach kids about the physics of tennis and how temperature affects the game. Science Buddies Staff. Discussion: Each ball in a can is different in weight, diameter, and bounce. Doherty, P., 1991. 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