when a force retards the motion of the body ,then how the work done will be negative
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The moment when a force retards the motion of the body, the nature of work done is Negative, as the motion of the body is in opposite direction of the force exerted on it. Examples of negative work done are ; 1. Work done by the person to draw water from the well through pully.
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We know that w=F. S=FScos(angle between force and displasement). if force retards. then the angle between F, S is 180 then F. S is negative. so w is negative.
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