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The work-energy theorem is valid only for positive work done.

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in Physics – Class 11 by (74.2k points)
The work-energy theorem is valid only for positive work done.

(a) True

(b) False

This question was addressed to me in semester exam.

My question is based upon Work-Energy Theorem for a Variable Force in section Work, Energy and Power of Physics – Class 11

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Correct option is (b) False

The best explanation: Work energy theorem holds for both positive and negative work done. If the work doneis positive then final kinetic energy increases by the amount of the work and if work done is negative then final kinetic energy decreases by the amount of work done.

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