state three conditions when the work done by a body is zero
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Two conditions when the work done is zero are: (i) When there is no displacement (S=0) and, (ii) When the displacement is normal to the direction of the force (θ=90o). Concept: Concept of Work, Energy, Power
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when displacement is zero like
when you push the wall or you came to the same spot from where you started walking.
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