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A block weighing 10 kg just starts slidi...

A block weighing 10 kg just starts sliding down a rough inclined plane, which rises 5 in every 13 . What is the coefficient of friction ?

A

0.325

B

0.515

C

0.416

D

0.632

Text Solution

Verified by Experts

The correct Answer is:
C

Since the block just beigns to slide down the rough inclined plane,the angle of inclination `theta` is the angle of repose.
`:." "tantheta=mu`
In this case, `sintheta=5/(13),costheta=(12)/(13)` and `tantheta=5/(12)`
`:." "mu=tantheta=5/(12)=0.416`
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