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Question

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


We know that power, P=Work or EnergyTime
Given, energy =50 kJ=50×103 J, displacement =25 m and time =2.5 s.
So, power, P=50×1032.5=2×104 W
Since, 1 hp = 746 W
Therefore, power P=2×104746=26.8 hp.


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