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Question

The kinetic energy acquired by a mass m after travelling a fixed distance from rest under the action of constant force is

A
directly proportional to velocity.
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B
directly proportional to m.
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C
independent of m.
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D
inversely proportional to m.
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Solution

The correct option is C independent of m.
the gain in kinetic energy of the body will be equal to the work done by that force on the body
as we know work done by a constant force F is
W=F.S
given S is fixed hence kinetic energy is independent of mass of the body.

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