Questions
A body of mass 2 kg moves down the quadrant of a circle of radius 4 m. The velocity on reaching the lowest point is . Work done against friction is (take g = )
detailed solution
Correct option is C
According to work energy theorem, work done by all forces =ΔKEWgr+Wfr=ΔK.E=12mv2−0=12×2×64=64⇒Wfr=64−Wgr=64−mgR=64−80=−16JThus work done by body against friction = 16 JTalk to our academic expert!
Similar Questions
A chain lies on a rough horizontal table. It starts sliding when one-fourth of its length hangs over the edge of the table. The coefficient of static friction between the chain and the surface of the table is
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