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Work-Energy Theorem

The work done...

Question

The work done by all the forces on a system equals the change in

A

total energy.

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B

kinetic energy.

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C

potential energy.

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D

none of these

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Solution

The correct option is B kinetic energy.
Work on a free (no fields), rigid (no internal degrees of freedom) body, is equal to the change in kinetic energy of the velocity and rotation of that body,
$W = Δ K E$

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