A tennis player swings her 1000g racket with a speed of 10m/s. She hits a 60g te

Question

A tennis player swings her 1000g racket with a speed of 10m/s. She hits a 60g tennis ball that was approaching her at a speed of 25m/s. The ball rebounds at 40m/s. How 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. Express your answer using two significant figures. If the tennis ball and racket are in contact for 12ms, what is the average force that the racket exerts on the ball? Express your answer using two significant figures.

Explanation / Answer

A) conserving momentum, 1*10 - 0.06*25 = 1*v + 0.06*40 so, v = 6.1 m/s

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