Question

$50kJ$ of energy is consumed in $2.5s$. Calculate 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 work done per unit time.
So, power $=\frac{W}{t}=\frac{50\times {10}^3}{2.5}=2\times {10}^{4}W$
Now, we know that,
$\text{1 hp = 746 W}$
$\therefore$ Power $=2\times$ ${10}^{4}W$
$=\frac{2\times {10}^4}{746}=26.8hp$