When an object of mass m slides from point of height H (from Ground) in the semicircular groove and reaches another point which at same height (H), then work done by gravity in this case is:

mgH

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Infinite

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None of these

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Solution

The correct option is B 0
At same height potential energy is same.
Work done by gravity $= Δ P . E = 0$

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When an object of mass m slides from point of height H (from Ground) in the semicircular groove and reaches another point which at same height (H), then work done by gravity in this case is:

The correct option is B 0At same height potential energy is same.Work done by gravity =ΔP.E=0

The correct option is B 0
At same height potential energy is same.
Work done by gravity $= Δ P . E = 0$