Coefficient of Restitution of Wet Tennis Balls

Eugene Jang, Tony Kim
2014 Journal of Science International School Bangkok  
The coefficient of restitution of a damp tennis ball is of interest to tennis players. Using a spray bottle, water was added to a tennis ball and the mass of water on the wet ball was determined. The ball was then dropped from a fixed height of 0.86 m. The motion was recorded with a video camera and the bounce height was measured. Using the bounce height and the original height, the coefficient of restitution for that mass of added water was determined. The research found the mass of water
more » ... to the tennis ball to have a negatively linear relationship with the coefficient of restitution of the tennis ball.
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