Hydraulics

The video tutorial explains the concept of hydraulics, focusing on how liquids, due to their incompressibility, can be used to transmit pressure and multiply forces. It covers the basic principles of hydraulic systems, including the roles of master and slave pistons, and provides example calculations to illustrate force multiplication. The tutorial also discusses Pascal's principle and its applications in everyday machinery, such as car brakes and digger trucks, highlighting the practical uses of hydraulics in various machines.

Which of the following is true about the compressibility of liquids?

• Liquids are easily compressible like gases.

• Liquids are more compressible than solids.

• Liquids cannot be compressed at all.

• Liquids require a lot of pressure to compress slightly.

In a hydraulic system, what is the role of the master piston?

• It acts as a reservoir for the hydraulic fluid.

• It receives the pressure transmitted from the slave piston.

• It applies pressure that is transmitted to the slave piston.

• It compresses the liquid to increase pressure.

If a force of 20 newtons is applied to a master piston with an area of 0.01 m², what is the pressure produced?

• 200000 pascals

• 200 pascals

• 20000 pascals

• 2000 pascals

According to Pascal's principle, why does the pressure remain constant between the master and slave pistons?

• Because the force applied is always the same.

• Because liquids cannot be compressed.

• Because the area of the pistons is the same.

• Because liquids are compressible.

How do hydraulic systems in car brakes benefit from Pascal's principle?

• They allow a small force to stop the car by applying a large force on the brake pads.

• They compress the brake fluid to stop the car.

• They use air pressure to enhance braking.

• They require manual force to be applied directly to the brake pads.