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Unit 1_ Fluids - Pressure and Forces
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Unit 1_ Fluids - Pressure and Forces
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Unit 1: Fluids - Pressure and ForcesDensity-✅________ is a positive scalar quantity.
Density-✅Mass per unit volume of a substance is defined as density.
Buoyancy-✅If a body is fully or partially immersed in a fluid, it experiences
an upward force due to the fluid called buoyant force, and the phenomenon
is called buoyancy.
✅
The Volume Flow Rate- It is the volume of fluid that passes through a
particular point per unit of time.
f = Av
f = volumetric flow rate
A = cross-sectional area
v = flow velocity v
✅
Bernoulli’s Effect- At comparable heights, the pressure is lower where the
flow speed is greater.
✅
Air Flow- The air on the bottom has greater pressure and pushes up on
the wing giving the airplane lift force
✅
Pressure- Pressure is defined as the magnitude of the normal force
acting per unit surface area.
P = F/A
P is pressure
F is force
A is the area
✅
Pressure units- Pascal (Pa) 1 Pa = 1 N/m^2
Practical units: atm, bar, torr
Hydrostatic pressure- ✅It is the pressure due to the liquid.
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