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A block of mass m=2kg is placed in equil...

A block of mass `m=2kg` is placed in equilibrium on a moving plank accelerating with `a=1m//s^(2)` . If coefficient of friction between plank and block `mu=0.2` . The friction force acting on theblock is:

A

2N

B

4N

C

3N

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
In this case driving force=ma
`=2xx1=2N`
And resisting force `=f_(lim)=muN=4N`
Hence the mass will not slide over the plank friction should be static nature `f=2N` .
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Knowledge Check

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