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A Sphere moving with velocity v strikes ...

A Sphere moving with velocity v strikes a wall moving towards the sphere with a velocity u. If the mass of the wall is infinitely large the work done by the wall during collision will be:

A

`m u(v+u)`

B

`2m u(v+u)`

C

`2 m v(v+u)`

D

`2 m(v+u)`

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The correct Answer is:
B
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