GCSE Questions: Forces

Q29. 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]

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]