Question

A car of mass ‘m' is driven with acceleration ‘a' along a straight level road against a constant external resistive force ‘r'. when the velocity of the car is ‘v' , the rate at which the engine of the car is doing work will be

Answer 1

the rate at which the engine of the car is doing work will be e.

Answer 2

Force required to oppose resistive force R and move with acceleration a is R+ma

Power of a body is defined as the rate at which the body can do the work. Power=Force × Velocity

=(R+ma)V