Fuid Statics Flashcards
(26 cards)
What is fluid statics?
The study of fluids at rest and the forces and pressures associated with them.
True or False: In fluid statics, the fluid is in motion.
False
What is hydrostatic pressure?
The pressure exerted by a fluid at equilibrium due to the force of gravity.
Fill in the blank: The hydrostatic pressure at a depth ‘h’ in a fluid is given by ______.
P = ρgh
What does the symbol ‘ρ’ represent in the hydrostatic pressure equation?
The density of the fluid.
What is the SI unit of pressure?
Pascal (Pa)
True or False: The pressure in a fluid increases with depth.
True
What is Pascal’s principle?
A change in pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid.
What is the relationship between pressure and area in fluid statics?
Pressure is defined as force per unit area (P = F/A).
Short answer: What is the formula for calculating pressure at a certain depth in a fluid?
P = P0 + ρgh
What is the term for the upward force exerted by a fluid on an object submerged in it?
Buoyant force
Fill in the blank: The buoyant force on an object is equal to the weight of the ______ displaced by the object.
fluid
What principle explains why objects float or sink in fluids?
Archimedes’ principle
True or False: An object will float if its density is greater than that of the fluid.
False
What is the formula for the buoyant force?
F_b = ρ_fluid * V_displaced * g
What does the term ‘specific gravity’ refer to?
The ratio of the density of a substance to the density of a reference substance, typically water.
Fill in the blank: The specific gravity of a fluid is calculated as ______.
SG = ρ_fluid / ρ_water
What is the effect of atmospheric pressure on fluid statics?
Atmospheric pressure affects the pressure at the surface of the fluid and influences the overall pressure distribution.
True or False: The total pressure at a point in a fluid is the sum of the hydrostatic pressure and the atmospheric pressure.
True
What is the definition of a manometer?
A device used to measure the pressure of a fluid by comparing it to a column of liquid.
Short answer: How does a U-tube manometer work?
It measures pressure by observing the height difference of liquid columns in the two arms.
What is the significance of the center of pressure?
It is the point where the total pressure force acts on a submerged surface.
Fill in the blank: The center of pressure is located ______ the centroid of the area for vertical surfaces.
below
What is the formula used to calculate the center of pressure for a submerged vertical surface?
y_cp = y_c + (I_g / (A * y_c))
