a car is moving at a constant speed of 20m/s^-1. The force retarding its motion is 500N. Calculate the engine power of the car required to maintain the motion

Answer 1

The net force must be 0 in order to maintain the motion according to Newton's first law of motion.
=> F=500N
Engine power P = F.x/t = F.v = 10000J/s

Answer 2

I dont understand.

Answer 3

Show working

Answer 4

What is the engine power of a car with retarding force 500N moving at constant speed 20m/s?