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A time varying force F = 5t is applied o...

A time varying force F = 5t is applied on a block kept on a rough horizontal surface. Mass of block is 10 kg, coefficient of static and kinetic friction between block and horizontal surface are 0.3 and 0.2 respectively. Take g = 10 `m//s^(2)` Find the time at which slipping starts between block and the surface beneath it.

A

3s

B

4s

C

5s

D

6s

Text Solution

Verified by Experts

The correct Answer is:
d
`f_(s)max =mu_(s)N=mu_(s)mg =0.3(100)=30N` slipping starts when F=30 N `rarr` t=6s
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