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A lift moving with a uniform velocity v ...

A lift moving with a uniform velocity v in which a block of mass `m` is lying .The friction force offered by the when coefficient of friction is `mu = 0.5` will be

A

zero

B

`mg//2`

C

`mg`

D

`2mg`

Text Solution

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The correct Answer is:
A
Zero , no driving force, so friction is zero
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