Positive and Negative Work Assignment Help

Positive and Negative Work

Work done by a force may be positive or negative depending on the angle q between the force and displacement. If the angle q is acute (q < 90o), then the work done is positive and the component of force is parallel to the displacement.


If the angle q is obtuse (q > 90o), the component of force is antiparallel to the displacement and the work done by force is negative.

Zero Work Done

It is clear from the equation that the work done by a force is zero when

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Positive and Negative Work Assignment Help By Online Tutoring and Guided Sessions at AssignmentHelp.Net

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(a) F = 0
(b) s = 0
(c) cosq =l 0
or q = 90o

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