4.9 p=phg and archimedes principle Flashcards
What is the formula for the pressure exerted by a fluid at depth
pressure = height x density of the fluid x acceleration due to gravity or P=ρgh
state the law of floatation
the weight of liquid displaced by it’s immersed part is equal to the total weight of the body
state archimedes principle
the upthrust on an object in a fluid is equal to the weight of fluid it displaces
define fluid
a substance that can flow, including gases and liquids
define density
the mass per unit volume of a substance the unit is kg m^-3
define pressure
the force exerted per unit cross-sectional area, measured in pascals
what is 1 pascal equal to
1 Pa = 1 Nm^-2
Force that an object submerged in a fluid experiences?
The force is upthrust, this is because the pressure at the bottom of the surface of the object is greater that the pressure at the surface of the object
Define upthrust
The upward buoyant force exerted on a body immersed in a fluid
