Asked Nov 4, 2019

After falling from rest from a height of 31 m, a 0.60-kg ball rebounds upward, reaching a height of 21 m. If the contact between ball and ground lasted 2.5 ms, what average force was exerted on the ball? 

check_circleExpert Solution
Step 1

Assume that the velocity in downward direction is negative and in upward direction is positive.

 Velocity of the ball as it strikes the ground is


Image Transcriptionclose

2gh 2(9.8)(31) 24.64m/s

Step 2

Velocity of the ball as it just ...

2= 2gH
=20.28 m/s

Image Transcriptionclose

2= 2gH 2(9.8)(21) =20.28 m/s


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