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Question

50kJ of energy causes a displacement of 25m for a body in the direction of force for 2.5s. Find the power in a unit of horse power.


A

26.8 hp

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B

28.6 hp

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C

13.4 hp

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D

14.3 hp

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Solution

The correct option is A

26.8 hp


Power is defined as the rate of change of energy.
So, power=50×1032.5=2×104W
Now, we know that,
1 hp = 746 W
Therefore, power =2× 104W
=2×106746=26.8hp


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