Question

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

• A. 26.8 hp
• B. 28.6 hp
• C. 13.4 hp
• D. 14.3 hp

Answer 1

The correct option is A

26.8 hp

Power is defined as the rate of change of energy.
So, $power=\frac{50\times {10}^6}{2.5}=2\times {10}^{4}W$
Now, we know that,
$1hp=746W$
Therefore, power $=2\times$ ${10}^{4}W$
$=\frac{2\times {10}^6}{746}=26.8hp$