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Question

A force of magnitude 25 N acting on a body of mass 2 kg increases its kinetic energy from 0 J to 100 J. The displacement of the body during this interval is ___m.



A

4m

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B

3

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C

2

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D

1

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Solution

The correct option is C

4


According to work-energy theorem, work done by the force would be equal to the change in kinetic energy of the body. The change in kinetic energy is equal to 100 J and we know that:

Work done = Force x displacement.

Therefore, 100 = 25 x displacement. So, from here we have displacement = 4 m.


Physics

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