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PhysicsW.E.P.Calculation of workHard2 minPYQ_2020
PhysicsHardsingle choice

A chain (massM) is hanging from a wooden structure as shown in the figureA. It is slowly taken to a state as shown in the figureB. Calculate the work done by gravity in the process (assume that after reaching the ground, the chain does not form a heap)

Options:

Answer:
D
Solution:

Work done by gravity = – (Change in P.E.)

⇒ ui= ulinear+ ucurved

= Mass per unit length = M a + π b 4

W gravity = u i - u f = Mgb 4 a + π b b + a π

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Calculation of work
2mℹ️ Source: PYQ_2020

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