Question

State Pascal's law . Write a mathematical expression for it

Answer 1

Answer:

Pascal's law (also Pascal's principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics given by Blaise Pascal that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere. The law was established by French mathematician Blaise Pascal in 1653 and published in 1663.

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Answer 2

Answer: According to Pascal’s law,

   “The external static pressure applied on a confined liquid is distributed or transmitted evenly throughout the liquid in all directions”.

Let us understand the working principle of Pascal’s law with an example.    

A pressure of 2000 Pa is transmitted throughout a liquid column due to a force being applied on a piston. If the piston has an area of 0.1 m2, what is the force applied?

This can be calculated using Pascal’s Law formula.

F = PA

Here,

P = 2000 Pa = N/m2

A = 0.1 m2

Substituting values, we arrive at F = 200 N

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