DEFINATION: - “A change in pressure applied to an enclosed ( incompressible ) fluid is transmitted
undiminished to every point of the fluid and the walls of the containing vessel.” This statement is known as Pascal’s law.
Pascal’s law is also given as “If the effect of gravitation is neglected, the pressure at every point in an incompressible liquid, in equilibrium, is the same.”
APPLICATION OF PASCAL'S LAW: -
undiminished to every point of the fluid and the walls of the containing vessel.” This statement is known as Pascal’s law.
Pascal’s law is also given as “If the effect of gravitation is neglected, the pressure at every point in an incompressible liquid, in equilibrium, is the same.”
APPLICATION OF PASCAL'S LAW: -
The figure shows the principle of a hydraulic lift used to raise heavy loads. This device has two vertical
cylinders of different diameters connected by a horizontal tube. A liquid is filled in this vessel. Airtight
pistons having cross-sectional areas A 1 and A 2 ( A 1 < A 2 ) are fitted touching the liquid surface in
both the cylinders. According to Pascal’s law, in equilibrium, the pressure on liquid in both the arms
is the same. Hence,
F1 = P1 = P2 = F2 ⇒ F2 = F1[ A2/A1]
cylinders of different diameters connected by a horizontal tube. A liquid is filled in this vessel. Airtight
pistons having cross-sectional areas A 1 and A 2 ( A 1 < A 2 ) are fitted touching the liquid surface in
both the cylinders. According to Pascal’s law, in equilibrium, the pressure on liquid in both the arms
is the same. Hence,
F1 = P1 = P2 = F2 ⇒ F2 = F1[ A2/A1]
A1 A2
Thus, a large force, F2, is generated using a small force, F1, as the magnitude of F2 is [A2/A1] times the magnitude of F1. Using Pascal’s law, devices like hydraulic lift, hydraulic jack, hydraulic brake and hydraulic press are developed.
Thus, a large force, F2, is generated using a small force, F1, as the magnitude of F2 is [A2/A1] times the magnitude of F1. Using Pascal’s law, devices like hydraulic lift, hydraulic jack, hydraulic brake and hydraulic press are developed.
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