Ch. 4-3 Flashcards
A push or pull
Force
Pressure = force/area
Kpa = N/sq.meters
Pressure
Kpa unit of pressure
Pascal
Pressure of air measured in kilopascal (kpa)
Atmospheric pressure
What happens to atmospheric pressure when altitude increases?
Atmospheric pressure decreases
When and what did Blaise Pacscal do?
17th century French physician tested altitude and air pressure
What happens to gas when volume decreases pressure?
When volume decreases, pressure increases. When volume is the same but temperature increases the pressure increases.
The difference in pressure results in an upward force on an object immersed in a fluid. If the buoyant force is equal to the weight of the object the object will float
Buoyant force
The buoyant force of an object is equal to the weight of the fluid displaced by the the object.
Archimedes’ principle
Mass divided by volume
Density
When a force is applied to a confined fluid, an increase pressure is transmitted equally to all parts of the fluid
Pascal’s principled - when a force is applied to a confined fluid and an increase pressure is transmitted equally to all parts of the fluid
Uses Pascals principle to lift heavy objects
Hydraulic systems
Pa = N x area
Pressure formula
Force (N) = pressure (kPa) x area (sq m)
Force formula
A closed container with a hole in it is squeezed, the fluid will be pushed out
Force
