- #1
angotta
- 7
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1. A tennis player swings her 1000 g racket with a speed of 5.00 . She hits a 60 g tennis ball that was approaching her at a speed of 13.0 . The ball rebounds at 37.0 .
Part A
ow fast is her racket moving immediately after the impact? You can ignore the interaction of the racket with her hand for the brief duration of the collision.
part B:If the tennis ball and racket are in contact for 15.0 , what is the average force that the racket exerts on the ball?
2. Homework Equations :
I would assume pf=pi and also p=mv where p is momentum
3. The Attempt at a Solution
I found the initial momentum of the racket to be 5Ns and the initial momentum of the ball to be -.78 Ns
Then I attempted to find the final velocity of the racket and was stuck...I tried to first use the equation for momentum with a mass of 1.06 kg b/c that is the mass when the objects are in a system. the velocity final should be 37 m/s due to the fact that the rebound velocity is that, but I don't know where to go or what to do.
Part A
![Gah! :H :H](/styles/physicsforums/xenforo/smilies/arghh.png)
part B:If the tennis ball and racket are in contact for 15.0 , what is the average force that the racket exerts on the ball?
2. Homework Equations :
I would assume pf=pi and also p=mv where p is momentum
3. The Attempt at a Solution
I found the initial momentum of the racket to be 5Ns and the initial momentum of the ball to be -.78 Ns
Then I attempted to find the final velocity of the racket and was stuck...I tried to first use the equation for momentum with a mass of 1.06 kg b/c that is the mass when the objects are in a system. the velocity final should be 37 m/s due to the fact that the rebound velocity is that, but I don't know where to go or what to do.