Name two devices working on Pascal's law.

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(N/A) Pascal's law states that a change in pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and to the walls of the container.
Two common devices that operate on this principle are:
$1$. Hydraulic lift: Used to lift heavy objects like cars in service stations.
$2$. Hydraulic brakes: Used in automobiles to stop or slow down the vehicle by applying pressure to the brake fluid.

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State Pascal's law. Explain its application in a hydraulic lift.

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In a hydraulic lift,if the radius of the smaller piston is $5 \ cm$,and the radius of the larger piston is $50 \ cm$,then the weight that the larger piston can support when a force of $250 \ N$ is applied to the smaller piston is (in $kN$)

Write a short note on hydraulic brakes.

In a car lift,compressed air exerts a force $F_{1}$ on a small piston having a radius of $5.0 \; cm$. This pressure is transmitted to a second piston of radius $15 \; cm$. If the mass of the car to be lifted is $1350 \; kg$,calculate $F_{1}$. What is the pressure necessary to accomplish this task? $(g = 9.8 \; m s^{-2})$

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