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Q.

A body of mass m falls from a height h1 and rises to a height h2 . The magnitude of the change in momentum during the impact with the ground.

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a

mg(h1+h2)

b

m(2gh1+2gh2)

c

m(2gh1−2gh2)

d

Zero

answer is B.

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Detailed Solution

V1=2gh1 V2=−2gh2 Change is momentum m(V1−V2) =m(2gh1+2gh2)
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