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Question

# Arun is travelling with his friends in a car. The car suddenly stops due to some problem in the engine. Arun and his friends apply a force of 1000 N to drag the car to the nearest garage with a displacement of 1.2 km from that place. Determine the total power applied by them, if they dragged it to the nearest garage in 20 minutes.

A

2000 W

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B

3000 W

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C

1000 W

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D

500 W

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Solution

## The correct option is C 1000 W Given, Force, F = 1000 N Displacement, s = 1.2 km We know that, Work done = Force x displacement ⇒Work done =1000×1.2×1000 Nm = 12×105J. Now, the total power required can be calculated as, Power = Work doneTotal time taken Power = 12×10520×60 = 1000W.

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