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Question

Power versus time graph for a force is given below. Then, work done by the force upto time t (t0)


A
first decreases then increases
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B
first increases then decreases
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C
always increases
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D
always decreases
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Solution

The correct option is C always increases
W=P dt
Work done is the area under the curve of power (P) vs time (t).


Area under the curve is continously increasing, since with increase in time, the curve stays always above the time axis.

Work done by the force is always increasing.

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