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A block of mass 12 kg moving on a rough ...

A block of mass `12 kg` moving on a rough horizontal surface having `(mu_(k) = 0.5, mu_(s) = 0.6)` with a speed `2 m//s` at any instant and a 12 N force is acting opposite to its motion as shown in figure. Friction force acting on the block is

A

`72 hat(i) N`

B

`-72 hat(i) N`

C

`60 hat(i) N`

D

`-60 hat(i) N`

Text Solution

Verified by Experts

The correct Answer is:
C
`f_("max") = mu_(k) N`
`= mu_(k) xx 12g`
`= 0.5 xx 120`
`60 N`
since block is in motion kinetic friction acts on it.
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