Whipping his racquet through the air like a cesta in jai alai, Rafael Nadal produces such tremendous topspin that the ball sometimes seems to catapult off the court, creating a shot as challenging to ...

Circular motion, instantaneous velocity of an object moving in a circle. When demonstrating circular motion, swing the ball in a vertical path to increase visibility. When demonstrating the ...

In many ball sports like golf, football and tennis, controlling the ball’s spin is an important skill. Expert players can make golf balls curve around obstacles, launch footballs towards goal posts ...