What does the work-kinetic energy theorem imply?
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Answer:
The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.
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It implies the following.
(1) If the work done by the force on the body is positive then its kinetic energy increases.
(ii) If the work done by the force on the body is negative then its kinetic energy decreases.
(iii) If there is no work done by the force on the body then there is no change in its kinetic energy, which means that the body has moved at constant speed provided its mass remains constant.
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