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The curved portions are smooth and horizontal surface is rough. The block is released from P. At what distance from A, it will stop (if μ = 0.8)?

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By Expert Faculty of Sri Chaitanya
a
1.25 m
b
2 m
c
3 m
d
4 m

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detailed solution

Correct option is A

The distance travelled by the block on the rough surface can be calculated from energy conservation.Ki+Ui=Kf+Uf+WFwhere, Wf  = work done by friction.⇒0+mgh=0+0+μmgs⇒s=hμ=10.8=1.25 m The bllock stops at distance 1.25 m from A.

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