Pressure & Pascal's Principle - 1 Video Lecture | Fluid Mechanics for Mechanical Engineering

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FAQs on Pressure & Pascal's Principle - 1 Video Lecture - Fluid Mechanics for Mechanical Engineering

1. What is pressure and how is it measured?
Ans. Pressure is defined as the force applied per unit area. It is measured using a device called a pressure gauge, which typically uses a manometer or a pressure sensor to determine the pressure exerted on a surface.
2. What is Pascal's principle and how does it relate to pressure?
Ans. Pascal's principle states that when pressure is applied to a fluid (a gas or a liquid) in a closed container, the pressure is transmitted equally in all directions. This means that an increase in pressure at one point in a fluid will result in an equal increase in pressure at all other points within the fluid.
3. How does Pascal's principle apply to hydraulic systems?
Ans. Pascal's principle is the underlying principle behind hydraulic systems. In a hydraulic system, a small force applied to a small piston is transmitted through an incompressible fluid to a larger piston, resulting in a larger force being exerted. This is possible because the pressure applied to the fluid is transmitted equally throughout the system, as per Pascal's principle.
4. What are some real-life applications of Pascal's principle?
Ans. Pascal's principle finds applications in various aspects of everyday life. Some examples include hydraulic car lifts, hydraulic brakes in vehicles, hydraulic jacks, and hydraulic systems used in heavy machinery and construction equipment. These applications leverage the principle to amplify force and perform tasks that would otherwise be difficult or impossible.
5. How does pressure affect the buoyancy of objects in fluids?
Ans. Pressure plays a crucial role in determining the buoyancy of objects in fluids. According to Archimedes' principle, an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object. The pressure difference between the top and bottom of the object contributes to this buoyant force, with greater pressure resulting in greater buoyancy.
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