Hydrostatics pressure
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All thanks to Ashurii-sensei ☺. This PowerPoint is an introduction to pressure in solids and fluids. Just the basics (Your welcome).
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Pressure is defined as force per unit area. Several examples are given to illustrate that pressure increases when a force is applied over a smaller area. Pressure also increases with depth in liquids and density of the liquid. Various instruments are discussed for measuring pressure, including manometers, mercury barometers, aneroid barometers, and pressure gauges. Pascal's principle of transmission of pressure in liquids is demonstrated through experiments. Applications of pressure in hydraulic machines, bicycle pumps, lift pumps, force pumps, and siphons are also described.
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Here are the steps to solve this problem using Pascal's law:
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Pressure
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Physics 1.11 - Pressure.pptx
1. Pressure is defined as force per unit area and can be calculated using the equation p=F/A.
2. Atmospheric pressure can be measured using a mercury barometer, where atmospheric pressure pushes mercury up the tube. Pressure decreases with increasing altitude.
3. Pressure increases with depth in liquids and depends on the density of the liquid. Higher density liquids exert greater pressure at the same depth.
4. Hydraulic systems use incompressible liquids to multiply force through differences in applied and reacted areas. A small force applied to a small area can produce a larger force from the same pressure over a larger area.
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Hydrostatics pressure
- 2. PRESSURE Pressure is the force per unit area over which the force is applied.
- 3. Pressure formula • The pressure formula allows you to calculate the pressure, force or area given two of the factors. • Pressure is measured in Pascals (Pa). 1 Pascal = 1 N/m2 • Force is measured in Newtons (N). • Area is measured in metres squared (m2). EXAMPLE A force of 10N acts over an area of 2 m2. What pressure is created by the force? Pressure = Force ÷ Area Pressure = 10 N ÷ 2 m2 Pressure = 5 N m2 ---> 5 Pa
- 4. EXAMPLE 2 A) If a block weighs 60 N and is lying on a side with area 2m by 3m, what is the pressure exerted on the surface? Pressure = Force ÷ Area P = 60 N ÷ (2m x 3m) P = 60 N ÷ (6m2) P = 10 Pascals B) If the same 60 N block is now lying on its end which is 2m x 0.5m, what is the pressure? Pressure = Force ÷ Area P = 60 N ÷ (2m x 0.5m) P = 60 N ÷ (1m2) P = 60 Pascals
- 6. Pressure in Fluids • Fluid pressure is a measurement of the force per unit area on a object in the fluid or on the surface of a closed container. • Since a fluid has no definite shape, its pressure applies in all directions.
- 7. Pressure in Fluids • The deeper the object is placed in the fluid, the more pressure it experiences. • This is because is the weight of the fluid above it. • The more dense the fluid above it, the more pressure is exerted on the object that is submerged, due to the weight of the fluid. • The formula that gives the P pressure on an object submerged in a fluid is P = ρ × g × h • ρ is the density of the fluid • g is the acceleration of gravity • h is the height of the object at that point in the flu
- 8. Density of a Fluid • The density, (often represented by the symbol ρ) • is defined as the mass over the volume. • The unit for density is kg/m3
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- 10. Pressure