Q1.
Ans- (a) 26.7 N
Force applied is , F= change in momentum of ball / time duration
F= (mVf - m Vi)/ t
F= (0.200*12 - 0.200*20)/(60.0 * 10^-3)
F= - 26.7N
Hence magnitude of force applied is 26.7N.
So, correct option is (a) 26.7 N
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