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A block of mass 20kg is pushed with a ho...

A block of mass `20kg` is pushed with a horizontal force of `90N`. It the coefficient of static and kinetic friction are 0.4 and 0.3, the frictional force acting on the block is `(g =10ms^(-2))` .

A

`90`N`

B

`80N`

C

`60N`

D

`30N`

Text Solution

Verified by Experts

The correct Answer is:
C
`f_(k) =mu_(k) N,N =mg`
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