Questions
The upper half of an inclined plane with inclination is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom, if the coefficient of friction for the Lower half is given by
detailed solution
Correct option is C
According to work energy theoremW=Δk=0 (∵ Initial and final speeds are zero ) ∴ Work done by friction + Work done by gravity =0 or −(μmgcosϕ)l2+mglsinϕ=0 μ2cosϕ=sinϕTalk to our academic expert!
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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 = 0.8)?
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