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Question

A kid pushes his toy of weight 100 grams along a distance of 5 m on the floor. He applied force of magnitude 9 N. What is the work done by the kid to displace the toy? Is there any change in potential energy possessed by the toy?


A

4.5 J with no change in potential energy

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B

45 J with a change in potential energy

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C

45 J with no change in potential energy

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D

4.5 J with a change in potential energy

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Solution

The correct option is C

45 J with no change in potential energy


Weight of the toy = 0.1 kg
Displacement S = 5 m
Force applied F = 10 N
Energy consumed = Work done to move the toy
= Force × Displacement
= (9 × 5) = 45 J
As there is no change in the vertical height, the potential energy possessed by the toy does not change.


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