NEET 2011 Physics question

Physics Systems of Particles and Rotational Motion NEET 2011

A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is :

(1)MV
(2)1.5 MV
(3)2 MVCorrect
(4)Zero

Answer: (3)

Solution

Impulse equals the change in momentum. Taking the initial direction as positive: initial momentum ,

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Question ID VK-090967