How does the COR affect different types of sports balls bounce on different types of surfaces?

AIM – the aim of this experiment is to find out how the COR (coefficient of restitution) of 3 balls (tennis ball, snooker ball and ping pong ball).

FORMULA USED FOR COR –

GPE (after) = KE (after)
GPE (before) = KE (before)

mxgxHr = ½ x mx Vout²
mxgxHd ½ x m Vin²

Hr = Vout²
Hd Vin²

APPARATUS–
• meter stick,
• tennis ball,
• ping pong ball,
• snooker ball,
• surfaces; wood and carpet

METHOD - I will firstly organize all the apparatus that are needed for this experiment.
1. I will make 3 tables for my results to be recorded in.
2. Then I will get my partner to hold the meter stick firmly with one hand.
3. In the other hand of my partner, the first ball will be held.
4. My partner will drop the ball from a height of 100cm.
5. I will keep at eye level and watch closely
6. I will record the height, to the nearest cm,......

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Title: Coefficient Of Restitution (Cor) Of 3 Balls
Approximate Word Count: 804
Approximate Pages: 4 (250 words per double-spaced page)

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