Question

A chain of length l<πR/2
is placed on a
smooth surface whose some part is
horizontal and some part is on quarter
circular of radius R in the vertical plane
as shown. Initially the whole part of
chain lies in the circular part with one
end at topmost point of circular surface.
If the mass of chain is m, then work
required to pull very slowly the whole
chain on horizontal part is -​

Answer 1

Answer:

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