TENNIS

Why?
I like watching people grunt as people try to hit the tennis ball.

Newtons First Law
The tennis ball will not move, unless a force acts on it. The ball remains at rest until someone picks it up and serves. The ball is hit back and forth until someone scores and the ball stops because of gravity and friction.

Newtons Second Law
When you hit the ball with a racket you exert a force on the ball. F=ma!
The force you put on the ball directly effects the acceleration. If you want to hit the ball harder, you put more force on the ball. If you want a little lob over the net, you hit it with less force.

Potential & Kinetic Energy
When the ball collides with a tennis racket, the racket bends outward. This is called a serve. The ball stores potential energy when it touches the strings and releases kinetic energy when the ball is served.

WHY IS SERENA WILLIAMS SO GOOD AT TENNIS?

• She is quick-get to ball easy
• Good Accuracy-hits to open spots
• Upper-Body Strength - hard ace
• Long Arms-stretch to get the ball

WHAT MAKES ROGER FREDERER SO GOOD AT TENNIS ?

• Quick-can get to ball easily
• Anticipation- he can tell where the ball is going
• Stays Calm-doesn't freeze in tough situations
• Smart-sees open spots and understands the game
• Even tempered- doesn't get frustrated easily

HOW IS MARIA SHARAPOVA SO GOOD AT TENNIS?

• Limber-can stretch out for the ball
• Tall-can see good angles
• Quick-can get to the ball fast