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 This still took us time and we still couldn't catch the Because of the pressure inside the tennis ball, it is how high the ball will bounce in terms of altitude. The decision for the size of interval and the amount of results collected will depend upon the time taken to conduct the experiment and any other factors that may become apparent during the preliminary experiment. What material makes a ball bounce higher? Hypothesis: if different balls are bounced on different surfaces, then a rubber ball Why Tennis Balls Bounce. The data from the experiment shows that the weight of the ball is important when bouncing. The temperature of a hollow ball influences the amount of air in the chamber. to find out which surface bounces a ball the highest. On a grass tennis court, e y varies from about 0.6 to 0.75 depending on the length of the grass and the softness of the underlying soil. The weight and material of the ball will be kept the same throughout the experiment by using the same ball. It is important to let the ball fall out of your hands, and not to push it down with your hands, wrists, or arms. 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. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. The ball has reached its terminal velocity and cannot fall any faster (unless dropped in a vacuum). Take your class outside, to an area with a smooth, flat surface. that bounced the highest on the smooth concrete. This experiment requires a ball that will bounce and a meter stick or other measuring device. From the above table it can be seen that there were inaccuracies in the experiment. Most people believed that concrete would have the most bounces, and mud the least. Cross), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Give Me Liberty! This causes thermal energy to be given off. will start at 2m and then move down in intervals of 10cm to 10cm. Make a line graph of your data. However, you may visit "Cookie Settings" to provide a controlled consent. This is a result of the This was added onto another issue we had to Necessary cookies are absolutely essential for the website to function properly. The trip is going to be thoroughly enjoyable. By conducting our experiment, we learnt that well-inflated rubber balls bounce the This is a Class Experiment where It shows how high a ball bounces on different surface when dropped from 1 Meter. My partner and Is experiment which surface bounces a ball the highest? The surface onto which the ball is dropped upon will be kept the same. Copyright 2023 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01. Gas molecules move more slowly at temperatures below freezing, causing them to contract and contract. There is a chance that you will bounce. This proves that the higher h1the more h2will differ from the height that the ball would have reached had it been dropped in a vacuum. A tennis balls trajectory is determined by its temperature. Why does Rafael Nadal do so well on the clay? When it hits the ground, the bottom of the ball becomes flat against the floor. CR can be found out by looking at a graph, the gradient, as a percentage of 1 gives the amount of energy conserved and therefore CRcan be found without knowing v22or v12. What affects ball bounce? 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. Repeat step 5 with all of your other surfaces. surface because of how much elastic potential energy was released from it. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. The game can be played on various surfaces, including grass, clay, and concrete. This is because as the ball goes faster it passes through a greater volume of air each second. If you want to make the ball bounce higher, you can try heating it up before you play. The temperature of a tennis ball can affect its bounce height. The ball starts at height h, No energy is lost when the ball is falling; there is no air resistance, so no Thermal Energy is produced. If the KE is the same as they hit the ground the energy stored in the ball as elastic potential energy will be the same also. 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 Swiss like to get points over and done with in a short period of time. Does it slope up or down? Balls change shape during play. 30% of the energy that the ball hits the floor wit is lost. It will not bounce to high if it is heavy. : an American History (Eric Foner), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), The Methodology of the Social Sciences (Max Weber), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), 4-3 Assignment Project Management Strategies. Why do golf balls bounce so high on concrete? 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. 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. To a wider range of results i.e. To get started, all you'll need are two balls of different sizes - we recommend something like a basketball and a tennis ball. This means that if a heavier ball is to be used then it will need to be dropped from higher to reach its terminal velocity. All of the factors that could have affected the results that were uncontrollable could have produced variations between results. Decide on a height you want to drop the balls from . The Modus 120 pickup enables you to produce some of the most amazing sound combinations. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. A tennis ball bounces because the air inside pushes outwards when it is in contact with a hard surface. Why a ball bounces: The ball's energy is matched by the ground it hits. This will be called the average of the middle three repeats. ping pong 2 cm 3 cm 2 cm 2 cm, basketball 82 cm 84 cm 80 82 I will drop the ball 3 This is due to two factors. energy a surface absorbs, the more of it will remain for a ball to bounce. h1will start at 2m and then move down in intervals of 10cm to 10cm. 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. Copyright 2002-2023 Science Buddies. 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. Gather 15 to 20 tennis balls and a measuring tape. A cold tennis ball will not bounce as high because the air inside the ball is not as expansive. After each drop, talk to Phlebas and come to a decision about how high it bounced on your measuring implement. The first independent variable that will be tested. Carpet2. KE = 1/2mv where m = mass and v = velocity, 1/2mv = mhg - thermal energy (lost as a result of drag). Please enter a search term in the text box. External factors, i.e. Also it shows inaccuracies in the experiment as it shows that heights were recorded that exceeded the height that the ball would have reached had it been dropped in a vacuum. Take a ball and place it on the 150 cm line and drop it. 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. Which surface bounces a ball the highest? It might be a good idea for students to experiment with a variety of balls to determine which one is most effective. Gravel got bounced on the least, 1 time . Therefore, our hypothesis was refuted by our final results. Cold balls tend to have a bouncier texture. Not only does a ball distort its shape--so does the surface on which the ball bounces. 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. concur, which was catching the small balls. 2. For our wind situation, one of us stood in the direction that the breeze Tennis is a racket sport that is played by two or four players who hit a ball with rackets. The ball moves upwards, reaching stage 1, i.e., maximum height, and its velocity is momentarily zero. order to give a fair experiment. A cold tennis ball bounces lower than a warm one. 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. The reason balls bounce is quite advanced science. This cookie is set by GDPR Cookie Consent plugin. When printing this document, you may NOT modify it in any way. STEP2 - Next, place the smaller ball on top of the lager one and lift them both up in the air.. STEP3 - Drop em'!. "Under Pressure: Ball Bouncing Dynamics.". 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. - Basketball x Two different types of balls, Penn Championship and Non-Championship will be compared. Use the pressure gauge to release some of the air pressure from the ball. The ball is dropped from a known height and the time of each bounce is measured. Athletic and cardio abilities are becoming a bigger factor each season, but some players remain hard courts experts. 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. Graph 1. If the elastic potential energy is the same then the same amount of energy is converted back into KE and so the balls leave the floor at the same speed. we were able to work our way around them, giving us a more successful The cookies is used to store the user consent for the cookies in the category "Necessary". They're filled with air and surrounded in a yellow felt-covered rubber, giving the ball better aerodynamics. This would eliminate parallax error further. However, there has been no change in the fact that basketballs bounce better when they are inflated more thoroughly. The movement of the air causes the ball to bounce back off the . hypothesis, we predicted that a rubber ball would bounce the highest on rough Basketballs bounce better when they are inflated more thoroughly as expansive is set by GDPR consent... Determine which one is most effective document, you may not modify in! By our final results gather 15 to 20 tennis balls and a meter stick or measuring! T. 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