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TheDividedSky
Sep20-04, 09:27 PM
Hello, I'm starting to study physics, and I have a problem that I have puzzled me for long... here it is. any help appreciated. thanks in advanced.

A tennis ball with a speed of 23.6 m/s is
thrown perpendicularly at a wall. After strik-
ing the wall, the ball rebounds in the opposite
direction with a speed of 14.6 m/s.
If the ball is in contact with the wall for
0.014 sec, what is the average acceleration of
the ball while it is in contact with the wall?

arildno
Sep20-04, 09:47 PM
1. What's the net change of the ball's velocity ?(remember signs!!)
2. How can you now find average acceleration?
3.Welcome to PF!