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Pascal’s Law is an important axiom in the study of the mechanical properties of fluids.

If the fluid is accelerating, the pressure difference between two points at different vertical levels is given by the formula:.

The pressure at two points at the same horizontal level in the fluid is the same if it is at rest or moving with a constant velocity.

The following are the rules governing the determination of pressure with respect to the mechanical properties of fluids : It acts perpendicular to any surface in the fluid. The pressure is a scalar quantity and has no direction of its own. It is the pressure at any point in the fluid and is defined as the normal force per unit area. With its applications rooted across aviation and other sectors, understanding this mechanical property of the fluid is essential. A barometer is used to measure total pressure while a manometer is used to measure the gauge pressure. Pressure above atmospheric pressure is termed as gauge pressure, while the total pressure is termed as the absolute pressure. The value generally taken is 1 bar or 1.013 x 10 5 Pa. Surface energy is the work done over the surface of a liquid to increase its surface area.Ītmospheric pressure is the pressure of the earth’s atmosphere. Surface tension is defined as the force per unit length in the plane of the liquid surface at right angles to either side of an imaginary line drawn on that surface. The path taken by particles is known as the line of flow. The type of flow in which the velocity of particles crossing a particular point is the same irrespective of time is known as steady flow. Fluid Dynamicsįluid dynamics incorporate energy into the study of the mechanical properties of fluids. Now that you have got a brief idea, let us understand the important mechanical properties of fluid in-detail.

Two-fluid surfaces in contact do not exert a tangential force on each other.

This property is known as incompressibility.

The density of fluids is independent of any pressure variation and remains constant.However, before proceeding, there are 2 important concepts which you must be aware about: And the study of the mechanical properties of fluids is known as Fluid Mechanics. Want to Prepare for SAT at the Comfort of Your Home? Brief OverviewĪll the substances in nature and otherwise, which flow, are known as fluids.