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Questions  

A ball of mas s m moving with a velocity u rebounds from a wall. The collision is assumed to be elastic and the force of interaction between the ball and wall varies as shown in the figure. Then the value of F0 is 

a
mu/T
b
2 mu/T
c
4 mu/T
d
mu/2 T

detailed solution

Correct option is C

Area under the force-time graph is impulse, and impulse is change in momentum.Area of graph + change in momentum⇒ 12TF0=2mu⇒F0=4muT

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