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Question

A smooth chain of mass m rests against a surface in the form of a quarter of circle of radius ‘r’. If it is released from, the velocity of chain after it  cmes over the horizontal part of the surface is

Moderate
Solution

W=12mv2u2mghihf=12mv202gr2rπ=12v2dm=mdθπ/2, h=R1-cosθ;U= 0π/2du= 0π/2dmghv=2gr12π

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