# How much energy is lost per bounce with a tennis ball? [closed]

When a tennis ball bounces it loses some energy. How much energy or height is lost per bounce?

• Well, what do you think? Are you familiar with the "coefficient of restitution"? Check out the Wikipedia article. – Bob D Sep 12 '19 at 19:27
• It depends on which brand of tennis ball. Drop a tennis ball from some height and measure how high it bounces up. That fractional height is the same as the fractional energy it still has. – G. Smith Sep 12 '19 at 19:47
• Less than silly-putty and more than a lacrosse ball? – Jon Custer Sep 12 '19 at 21:42

Measure it! Drop a tennis ball from $$1$$ meter and then measure as close as possible the height of its bounce. Use the simple potential energy of near Earth gravity $$V=mgh$$ to find what percentage of energy remained on the bounce. You can try various initial heights to see if that scale proportionately.