Question
The diagram below represents a motor car hydraulic braking system;
i. State two properties of the liquid used as a brake fluid
ii. Given that in the diagram (b) above, the master piston has an area of 15cm² and the slave piston has an area of 50cm² a force of 100N is applied on the master piston. Find the force used to stop the car.
iii. Compare the values of pressure in the two pistons above and give a reason for your answer.
iv) Give a reason why gas is not suitable for use in place of the brake fluid.
i. State two properties of the liquid used as a brake fluid
ii. Given that in the diagram (b) above, the master piston has an area of 15cm² and the slave piston has an area of 50cm² a force of 100N is applied on the master piston. Find the force used to stop the car.
iii. Compare the values of pressure in the two pistons above and give a reason for your answer.
iv) Give a reason why gas is not suitable for use in place of the brake fluid.
Answer
i)
- incompressible
- Low freezing point
- High boiling point
- Should not corrode the parts of the brake system
ii)
iii)
PA = PB
Pressure in liquids is transmitted equally in all directions.
iv)
Gas is compressible in liquid is incompressible.
- incompressible
- Low freezing point
- High boiling point
- Should not corrode the parts of the brake system
ii)
iii)
PA = PB
Pressure in liquids is transmitted equally in all directions.
iv)
Gas is compressible in liquid is incompressible.
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