A car needs to generate 75.0 hp in order to maintain a constant velocity of 27.3 m/s on a flat road.What is the magnitude of the total resistive force acting on the car (due to friction,air resistance,etc. )?

Question

Quizplus · Accepted Answer

The power required to maintain constant velocity is equal to the resistive force times the velocity. Converting 75 hp to watts (1 hp = 746 W), we get 75 * 746 = 55950 W. Using the formula Power = Force * Velocity, we have 55950 W = Force * 27.3 m/s. Solving for Force gives approximately 2.05 × 10^3 N.

A Car Needs to Generate 75