Question

The engine of a car develops a power of 5 HP and force 500 N while running a uniform speed S. Calculate the value of S.

Answer 1

P = Fv

\[ v = \frac{P}{F} \]

Taking 1 HP = 750 W, the power is P = 5 × 750 P = 3750 W

\[ v = \frac{3750}{500} \]

v = 7.5 m s⁻¹