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Physic Coursework - Squash ball experiment

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Physic Coursework Squash ball experiment Aim: My aim is to investigate what effect temperature has on the resulting bounce on a squash ball. Variables: 1. There are many variables to consider, such as 2. Pressure of air inside the squash ball 3. Type of surface the squash ball is bounced on 4. Height the squash ball is dropped from 5. Temperature of the squash ball 6. Material of the squash ball 7. Mass of the squash ball 8. Angle of surface that the squash ball is bounced on 9. Air resistance 10. Diameter of the squash ball 11. Temperature of surface that that squash ball is bounced on 12. Room temperature Prediction Through my scientific knowledge of the collision theory, I predict that as I increase the temperature of the ball, the bounce of the ball will increase as well. This is because as the ball gets hotter the particles in the ball gain energy and collide more. This means that when the ball hits the ground the particles collide so much that the ball is bounced higher. Therefore when I decrease the temperature of the ball the particles don't have as much energy so there is bounce but not as high. ...read more.


* I then measured the temperature using a thermometer. To reach the desired temperature for our results we used ice to cool the water. * I then placed the ball in the water for exactly one minute. * I then dried the ball and marked the set lengths we chose for our readings. * I dropped the ball from each length at the required temperature three times to gain the best results possible and also check for any anomalies. I dropped the ball on the same surface throughout the experiment. * I repeated this process for each of the set lengths. Conclusion: From the results I gathered I can conclude that the relationship between the increase in temperature and the height that the ball bounces, which has great similarities. For example, when the temperature was 90 C, the ball bounces at heights up to 48cm. Consider that when the temperature was 50 C, the ball only managed to bounce heights as high as 33cm. The results collected, back up my prediction, which was, as the ball gets hotter the resulting bounce is increase in height at each attempt. ...read more.


Evaluation: There were some problems during our experiment. These problems occurred as I was recording my results. No human eye would be able to record the height of the responding bounce of the ball. Because of this restriction I could only record my results to the nearest centimetre (cm). A solution to this is by using a video camera. Also the ball sometimes bounced off the meter ruler. This added to the list of problems. For future investigations I could use balls made of different materials to see how they would affect the bounce of the ball. To make the measuring of the heights even more accurate, we could use a camera that captures images at very high speeds, for example a flash camera. It can be important to know how different balls bounce in sport. In tennis the players need to adapt their game, throughout the day, to get the best possible result. When it's the afternoon the ball is given more energy, therefore bouncing off the tennis racket much faster and the players don't need to work as hard. However in the evening the players are forced to work harder due to the fact the sun's energy is not there, so the ball needs to be hit with more power. ?? ?? ?? ?? Melan Shah 11M ...read more.

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