A car of mass 1400 kg1400\text{ kg}1400 kg is travelling at a speed of 28 m/s28\text{ m/s}28 m/s on a road before the driver applies the brakes to bring the car to a stop.
Calculate the kinetic energy stored by the car when it is travelling at 28 m/s28\text{ m/s}28 m/s.
Describe the energy transfer that takes place as the car brakes and comes to a complete stop.
The braking distance of the car is 82 m82\text{ m}82 m. Calculate the average braking force acting on the car. Give your answer to 4 significant figures.