If you're playing under 68 degrees, it's a good idea to make sure the ball doesn't bounce too much. Aim:To find out what affects the height to which a ball bounces. Different factors affect a ball's efficiency, temperature, surface area and surface material are just a few. The material ball is made from will affect the ball as if it is smooth then the drag will be significantly less than if it is rough. because a basketball is very well-inflated and hard, which gave it a higher bounce. We then bounced the balls on the surfaces and, measured the heights. will 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 cookie is used to store the user consent for the cookies in the category "Performance". Why Tennis Balls Bounce. (2020, January 12). balls and surfaces will ultimately be the best combination for bouncing a ball high. to find out which surface bounces a ball the highest. This will be a table tennis ball. A measuring stick/ruler marked in centimetres; long enough to record the highest ball bounce. 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 was decided that the first drop would start at 2m off the floor and then move down in intervals of 10cm to 10 cm off the floor. They are typically softer, allowing them to give them a little more space and make them easier to hit. There are more than 160 different types of tennis surfaces. These inaccuracies could have been caused by external factors or parallax error even though efforts were made to avoid parallax error occurring - by dropping the ball one time that was not measured and placing a blob of blue tack onto the meter rule at the approximate height it bounced to. This cookie is set by GDPR Cookie Consent plugin. Air density will not change enough to affect the flight of the ball seeing as all the results will be collected during a brief period on one day. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Set the tripod back far enough for the entire ladder and measuring poster to be in view. The effect of surface on the bounce height of a tennis ball. Some of the balls energy can be converted into heat. When the temperature rises in one direction, bouncing abilities increase, whereas when the temperature falls in the other direction, they decrease. It might be a good idea for students to experiment with a variety of balls to determine which one is most effective. A hard surface, like concrete or hardwood, hardly absorbs any, so most of the kinetic energy of the fall goes into bouncing the ball back up. Belowis the graph of h1against h2. The harder the court surface is, the higher the rebounded ball will be. Cross), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Give Me Liberty! will start at 2m and then move down in intervals of 10cm to 10cm. For our wind situation, one of us stood in the direction that the breeze Therefore the heavier the ball is, the faster its terminal velocity. The first independent variable that will be tested. Necessary cookies are absolutely essential for the website to function properly. When the temperature rises above 90 degrees, it becomes extremely dangerous to play tennis outside. Place one of the tennis balls in the freezer for 20 mins 2. Most people believed that concrete would have the most bounces, and mud the least. When the temperature is below 68 degrees, the ball will bounce less. A decrease in h1, assuming g and m stay constant, results in a decrease in m g h1which results in a decrease in GPE. - Sticky tape - 1 roll. As the ball has less KE and is travelling slower it becomes stationary faster at the top of its arc. The reliability of our experiment wasn't so strong. It will be vinyl tiling. 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. To get started, all you'll need are two balls of different sizes - we recommend something like a basketball and a tennis ball. It will not have enough force to bounce if it is lit. Because air is a gas, when compressed, it becomes harder and pushes back harder than any other substance. Keep releasing pressure and repeating the experiment until the ball no longer bounces. Two different types of balls, Penn Championship and Non-Championship will be compared. This is correct unless the ball shows signs of reaching terminal velocity. The surface onto which the ball is dropped upon will be kept the same. Tennis balls are different at sea level and at high altitudes. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01. The grass does not provide as much upward rebound when the ball hits it. As an example, on the day we performed our experiment, a strong wind was Equipment/materials used: carpet, tennis 57 cm 56 cm 61 cm 58 cm You can stay in the game and avoid burning up by playing in the evenings or on a court with lighting. Reproduction of material from this website without written permission is strictly prohibited. Does it slope up or down? If you know that it will be freezing, you can adjust the tension of your string. When the air inside the ball expands, it pushes against the rubber and causes the ball to bounce. 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This cookie is set by GDPR Cookie Consent plugin. Does the weather make a difference? The average variation between results was 3cm. The temperature of the tennis ball has an impact on its bounce. Tennis cannot be played at a certain temperature; however, 70-90 degrees Fahrenheit is ideal. The ball did not appear to reach its terminal velocity which also supports my prediction. B. As velocity increases air resistance increases in proportion to the square of the velocity. Tennis balls bounce differently in the high altitude and at sea. 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 air pressure within the hollow ball changes as the temperature rises. Balls bounce up to 5 . What was the outcome? This is due to two factors. Then draw a line to connect the dots. Will the air pressure change the bounciness of a ball? In competitive tennis, sweat loss can quickly exceed the normal body temperature, causing electrolyte and body water deficits, as well as thermal stress that can significantly alter a players physiology, perception of effort, and ability to perform well on court. The more particles per cubic meter, the more drag acting upon the ball. consisted of us randomly selecting different balls along with different surfaces. There are many other great ball projects in this fun book by Madeline P. Goodstein. Therefore the results are valid. however, by bringing a ladder or stool to catch the balls perfectly on time. When printing this document, you may NOT modify it in any way. A cold ball typically has less bounce than a warm ball. from the ball, therefore causing it to bounce higher than it normally would on dirt In the heat, the molecules are more active, so the ball can bounce higher . The ball moves upwards, reaching stage 1, i.e., maximum height, and its velocity is momentarily zero. The results of the experiment were obtained with a method that ensured that every drop was under similar conditions which ensured a fair test. 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. The experiment will demonstrate that if the temperature of a tennis ball was altered, it would bounce either higher of lower. From this it can be seen that using the average of the middle three results is more accurate than using the average of all five, as it automatically discounts most anomalies. Find a clear space to work in. I also The bouncing of a tennis ball on a tennis court surface is analysed by making several simplifying assumptions about the physics of the interaction. Warm up the ball before it is used to increase its bounce. Record the new pressure reading in your data table and repeat steps 4 and 5. Therefore of the GPE that the ball possessed at the beginning some energy is given off as thermal energy. Bouncing is what makes playing with a ball so much fun. GPE=Mass (kg) Gravitational Field Strength (N/Kg) Height (m). The energy goes into deforming the ball-- from its original round shape to a squashed shape. Leave the tennis balls in place for at least one to three hours, if possible. As there is more GPE more energy is converted into KE (The ball is going faster, KE=1/2mv. Note whether the ball and surface showed more of an elastic or inelastic collision. Results are presented for a tennis ball, a . Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. Which surface bounces a ball the highest? [accessed August 4, 2006]. When a ball drops in air there is air resistance to which the ball loses energy in the form of thermal energy. Why Does One Tennis Shoe Pull Your Sock Down? was proven correct after our experiment. It would also be fun to explore the effect of different surfaces on the bounce of the bouncy ball. Obviously, a ball won't bounce as high on carpet. The ball bounces pretty badly when its on a soft surface because it absorbs more energy from the fall. Do you have specific questions about your science project? Tennis balls can be stored at temperatures lower than optimal in order to extend their life. Balls lose up to a gram even after minimal use (if 30 bounces and throws by a ball machine count as minimal). This means that not all the GPE is converted into KE as it would have been if the ball had been dropped in a vacuum. The exact interval will be determined after the preliminary experiment, as will the number of heights that the ball will be dropped from. 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. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. his the height of the balls bounce. Also it will affect its bouncing properties. Fully pump up the basketball and check the pressure with the pressure gauge. If the coefficient to restitution = 0.7, a ball dropping from h1in a vacuum would reach the height of 0.7 h1 after bouncing. Let the ball bounce until it stops, and then stop recording. Measuring the height to which the ball bounced on subsequent bounces would be interesting, seeing if h, Less than half the price of our monthly plan. (2020, November 20). Steel balls bounce higher than rubber balls. Air pressure will affect the balls fall slightly as the concentration of air particles per cubic meter varies with air pressure. This is longer than the 5-8 ms ball bounce from a solid surface or racquet. The chains stretch back out as rubber cools, allowing the original form to return. 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. hard ball made of rubber should bounce the highest on a concrete surface, which The approach was to place 3 tennis balls in 4 different environments with different temperatures. would bounce the highest on a hard, smooth concrete surface because a rubber ball Method: 1. Some of the kinetic energy of the ball is lost during the collision with the floor and the ball will not return to the original height. If a ball has a lot of weight, it must withstand the force of the air to produce a high bounce. This cookie is set by GDPR Cookie Consent plugin. Therefore the ball goes higher. Use the measuring tape to measure 150 cm off the ground. 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. Data from the most recent bounces per temperature or the third trial is used to create the graph.
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