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36 A body of mass m collides against a wall withthe velocity u and rebounds with the samespeed. Its change of momentum is-(A) 2 mu(C) mu(B) mu(D) 0 |
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Answer» let the velocity of body moving towards the wall be 'v'after collision the velocity would be (-v), i.e. in the opposite direction.so change in momentum, p= mv-(-mv)= 2mvso answer is (A) thanku |
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