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A lift is moving down with an accelerati...

A lift is moving down with an acceleration equal to the acceleration due to gravity. A body of mass `M` kept on the floor of the lift is pulled horizontally If the coefficient of friction is `mu` then the frictional resistance offered by the body is .

A

Mg

B

`mu`Mg

C

`2mu`Mg

D

zero

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The correct Answer is:
D
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