Kinesiology 2241A/B Lecture Notes - Lecture 16: Bouncy Ball, Tennis Ball, Topspin
21 Oct 2018
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What happens on the x isn"t necessarily what happens on the z because gravity only exists on the z. What happens on the x is effected by not having gravity there. Gravity constantly effects movement of object on z axis ball with side spin: A reaction force in the opposite direction of the spin. Ball rebound angle is in the direction of the reaction force. Way to make ball move side to side or straight back. All of the force is acting down. Grf acts to push the ball back up in a vertical manner. If you put rotation on a ball, effects trajectory of the object. If you spin the ball then drop it, bounces back to the side- this is because initiating some rotation. If you do this in tennis, put a spin on the ball when serving it, put top spin on the ball.
