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Physics of Tennis


The sport of tennis is the oldest and most love sport in the world. People have been playing tennis ever since the Acient Greeks took a stone and started hitting it back and forth over a fallen tree with branchs. Granted back then the sport was much more dangerous; many an acient greek lost an eye or a limb due to getting hit with the sharp rock that they played with, but even today the physics that govern the game today with the tennis balls with fuzz that sticks to your socks remain the same. Tennis is all about redirection of energy. A ball bouncing off the ground is effected by an impulse that changes the direction of it''s velocity. Current tennis balls are usually so bouncy that the collide elastically with the ground which means there's no loss in energy or speed. Then when the player hits the ball, the player usually swings the racket(or tree branch) which absorbs some the the energy so when the player hits teh ball some of the energy is lost but the ball gains more energy coming off the racket because it gains energy from the racket that has it's own energy that is transfered to the ball. Top spin on the ball causes it to go down because relative to the ground, the top of the ball is moving faster than the bottom so, air is flowing over the top faster, which causes the air to exert a force on the ball downward.

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