a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N what power output is required from the car's engine to drive the car on level ground

Question

a car drives at a constant speed of 23 m/s it is subject to a drag force of 500 N, what power output is required from the car's engine to drive the car on level ground?

Answer 1

The work done is F_dd where F_d is the force in the direction of the displacement and d is the displacement for a constant force:

Power is the rate of W = W/t = F_dd/t = F_dv for constant v and F

Power in watts or J/s = (500N)(23 m/s)