A car of mass 500kg is travelling along a horizontal road. The engine of the car is working at a constant rate of 5kW. The total resistance of motion is constant and is 250N. What is the acceleration of the car when its speed is at 5m/s?

Answer 1

work/second in from engine = thrust force * speed = 5,000 n m/s = F * 5 m/s
so F= 1,000 N
so
1,000 - 250 = 750 N = m a = 5,000 a
a = 750/5000

Answer 2

Correct answer to this