Tennis balls bounce due to 3 factors which all work seamlessly together: 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. Length of Lesson: 30 - 45 minutes. This is because the higher the starting height of the ball, the higher the ball's potential energy. measured the heights. Experiment 2 is for testing the effect of air pressure. Line up the top of the table tennis ball with the top of the metre ruler (i.e. The experiment was conducted as the method (below) states. Concrete got bounced on the most, 5 times, and the highest, 55cm. Use the paint and a tape measure to make a series of lines on your roll of paper. A tennis ball will bounce higher when it is hot because the air inside the ball is more expansive. The amount of energy absorbed by the surface will affect the bounce of the ball. 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. This blew the light balls away, giving us an unvalid result or catch. Record the new pressure reading in your data table and repeat steps 4 and 5. Reproduction of material from this website without written permission is strictly prohibited. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Easy Experiment This scientific mystery can be demonstrated at home or school with a simple experiment. However, even if its bitterly cold outside, indoor balls are a good choice. When a tennis ball is on the court, the bounces are heavily influenced by the environment. In this paper, the dynamics of a bouncing ball is described for several common ball types having different bounce characteristics. 70% is retained. Try comparing two days with different atmospheric pressure. The impact duration was between 65 and 71 ms. The balls finish up with the same amount of energy and the only energy given out is thermal energy. Here's what you need to do this experiment: Bouncy Balls - a least 6 identical balls; A measuring cup or mug for heating water in the microwave; Access to a freezer . The exact interval will be determined after the preliminary experiment, as will the number of heights that the ball will be dropped from. In the heat, the molecules are more active, so the ball can bounce higher . 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. Bouncing is what makes playing with a ball so much fun. Its not just a game for the wealthy; its also a game for everyone. The style of play and natural playing ability can be affected by the surface that it is on. The temperature of a hollow ball influences the amount of air in the chamber. There are more than 160 different types of tennis surfaces. h1 = The distance between the bottom of the ball before it is dropped and the ground. the "bouncing balls" experiment. bounces the highest on smooth concrete. An investigation into how they impact play on the court. Find an outdoor wall where you can hang up your background, set up a ladder, and film your experiment. 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. 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. Choosing The Right Shoes For Paddle Tennis, How To Decide If Tennis Shoes Are Appropriate For A Rooftop Event. Hot balls were the more likely to bounce higher than cold 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. This cookie is set by GDPR Cookie Consent plugin. Either the coefficient to restitution that was worked out is incorrect, which would mean that the first three results are inaccurate or subsequent results were inaccurate. Therefore, harder surfaces will ultimately bounce a ball higher. 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. This means that KE is the same for both balls when each ball hits the ground. If you are looking for a challenging sport, tennis is an excellent choice for the winter months. Belowis the graph of h1against h2. 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. to find out which surface bounces a ball the highest. This is because it is easiest as the figure read of the meter rule is the result. 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. The force of the ball hitting the ground causes it to bounce up, because it puts an equal force on the ball. The Physics of Grass, Clay, and Cement. Concrete4. 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. But how does concrete . Then make a series of lines every 5centimeters if you are using metric measurements, or every 3inches (1/4 of a foot) if you are using English measurements. As the ball has less KE and is travelling slower it becomes stationary faster at the top of its arc. 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. SCIENTIFIC Method Aim & Hypothesis Method Variables Risk Assessment Results Conclusion & discussion Take your class outside, to an area with a smooth, flat surface. I used a Flexible measuring tape to measure. 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. Record the new pressure reading in your data table and repeat steps 4 and 5. It will not bounce to high if it is heavy. The different types of tennis court surfaces are hard, clay, carpet, and grass. . 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. When printing this document, you may NOT modify it in any way. The strength of Nadals forehand is what makes him so good on clay. The weight and material of the ball will be kept the same throughout the experiment by using the same ball. Manipulated Variable: different surfaces on which the tennis ball is bounced (This is the only thing you can change.) 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. When dropped on a solid surface, not even a super ball bounces back as high as its initial height, but some balls do bounce a lot better than others. Different factors affect a ball's efficiency, temperature, surface area and surface material are just a few. Why do golf balls bounce so high on concrete? 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. The more energy absorbed by the surface, the less that remains in the ball for it to bounce. The air trapped in the ball is forced into the ground when it hits the ground. This experiment would provide me with more results that are relevant to the experiment that I have already conducted. - Sticky tape - 1 roll. 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. discovered that there is a handful of information that would assist my partner and I 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 KE that the ball possessed as it hit the floor, the more that was transferred into elastic potential energy and back into KE. Once the ball hits the ground, its displacement is momentarily zero. Playing in shade and with a bit of air movement is still a good idea if you want to get some exercise in the sun, but if you play outside in the shade with no breeze, you should stay in a cooler temperature range. Please enter a search term in the text box. 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The aim of the experiment my partner and I performed was to find out which The experiment will demonstrate that if the temperature of a tennis ball was altered, it would bounce either higher of lower. changing air density, temperature. less air resistance. This is impossible. When the temperature rises above 90 degrees, it becomes extremely dangerous to play tennis outside. From this I am able to determine that the experiment was very accurate. Above this point the height all balls will bounce to will not be directly proportional to the height they are dropped from, but the increase in the height they bounce to will increase more slowly in proportion to the height they are dropped from compared to the increase between lower heights before the ball shows signs of approaching its terminal velocity before it hits the ground. harder surfaces will ultimately bounce a ball higher. Air is pumped into the ball and causes it to bounce. GPE=Mass (kg) Gravitational Field Strength (N/Kg) Height (m). There is an activity at home that can be used to investigatebounciness. 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. When printing this document, you may NOT modify it in any way. 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. Likely to bounce for both balls when each ball hits the ground a measure. How to Decide if tennis Shoes are Appropriate for a Rooftop Event harder... And Cement # x27 ; s efficiency, temperature, surface area and surface material are just game... Displacement is momentarily zero steps 4 and 5 effect of air in the ball hitting the causes. 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Affect a ball higher hollow ball influences the amount of energy absorbed by the surface will affect bounce... 5 times, and the only energy given out is thermal energy, indoor balls are a choice... Also a game for everyone of play and natural playing ability can be demonstrated at home or school a.
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