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The block of mass 4kg is placed on a rou...

The block of mass 4kg is placed on a rough horizontal surface having the coefficient of kinetic and static friction as 0.4 and 0.5 respectively. If a force of 4N is applied to the body, then the frictional force acting on the body will be [g=`m/s^2`]

A

20N

B

10N

C

4N

D

8N

Text Solution

Verified by Experts

The correct Answer is:
C
The limiting force of friction,
`F=muR=mumg=0.5ss4ss10=20N`
The applied force is only 4N . It is not sufficient to move the body.
`:.` Upto limiting friction, the applied force
=Frictional force=4 N
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