why a liquid is used in a car’s breaking system, to transfer the pressure from the brake pedal pls explain using particle theory
Answers
Answer:
Liquids do not compress when you apply pressures to them. Liquid molecules can be pictured as touching each other although they can slide past each other. So you cannot push their molecules any closer together. Thus the pressure of your foot on the brake pedal is transferred fully through the liquid to the brake pads. The brake pads will push hard against the wheels to stop them rotating.
Gases compress easily as there are large gaps between gas molecules. Thus gas molecules can be pushed closer together. So the pressure you exert on the brake pedal will be mainly used to compress the gas molecules. Very little of that pressure will be transmitted through to the brake pads. The brake pads will not push hard against the wheels. The brakes will feel “spongy”. The braking effect will be largely ineffective.