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a man is rowi...

Question

a man is rowing upstream but is at rest with respect to the shore . is he doing work with respect to stream and shore ? justify ur answer in each case.

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Solution

Work is said to be done when a force produces a displacement in the body and acts in any direction except perpendicular to the direction of displacement.
Work = ForceÃ—Displacement
In this case work done is zero because displacement is zero.

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