GCSE Questions: ForcesQ29. The thinking distance and braking distance for a car vary with the speed of the car. (a) Explain the effect of two other factors on the braking distance of a car. Do not refer to speed in your answer. [4 marks] (b) The mean braking force on a car is 7200 N. If the car has a mass of 1600 kg calculate the deceleration of the car. [4 marks] (c) The graph below shows how the thinking distance and braking distance for a car vary with the speed of the car. Determine the stopping distance when the car is travelling at 80 km/h. [2 marks] (d) The diagram shows part of the braking system for a car. When the brake pedal is pressed, a force of 60 N is applied to the piston. The pressure in the brake fluid is 120 kPa. Calculate the surface area of the piston. Give your answer in standard form. [5 marks]
[16 Marks TOTAL] 
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