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GCSE Questions: Moments and Centre of Gravity

Q11. Before a new bus can be used on the roads, it must pass a stability test.

The diagram shows how the bus is tested.

(a)

(i) The bus will topple over if the ramp is tilted at too great an angle.

Explain why.

[2 marks]

(ii) The bus is tested to angles of tilt far greater than it would experience in normal use.

Suggest two reasons why.

[2 marks]

(b) The following diagram shows the hydraulic machine that is used to make the ramp tilt.

The pressure applied to the hydraulic liquid at the master piston is the same as the pressure applied by the hydraulic liquid to the slave piston.

(i) State the property of the liquid that keeps the pressure at both pistons the same.

[1 mark]

(ii) A 360 N force acts on the master piston.

Use information from the diagram to calculate the force applied by the hydraulic liquid to the slave piston.

[3 marks]

[8 Marks TOTAL]