10-When a car driver sees an emergency ahead, he applies the brakes. During his reaction time the cartravels at a steady speed and covers a distance known as the thinking distance. The braking distance is thedistance travelled by the car after the brakes are applied.(a)State the energy change that occurs as the car brakes. [2](b)Fig. 9.1 shows the speed-time graph of a car. The driver sees the emergency at time t = 0.The total mass of the car is 800 kg find the thinking distance
braking distance and
the deceleration of the car during braking,

(iv) the force provided by the brakes.
(c) Using ideas about friction and deceleration, state and explain how the braking distance is affected by
(i) using new tyres rather than badly worn tyres, .