Flashcards
Force and Pressure, AQA Chapter 11
Cards in this deck (15)
- 1What is meant by pressurePressure is the force normal to a surface / area of the surface
- 2What the unit of pressure isThe unit of pressure is the pascal (Pa), which is equal to 1 N/m2.
- 3How to use the pressure equationpressure, p (pascals, Pa) =
force, F (newtons, N) /
area, A (metres squared, m2) - 4How the pressure in a liquid increases with liquid depthThe pressure in a liquid increases with increasing liquid depth
- 5Why the pressure along a horizontal line in a liquid is constantA liquid flows until the pressure along the same horizontal level is constant.
- 6What the pressure in a liquid depends onThe greater the density of a liquid the greater the pressure in the liquid.
- 7How to calculate the pressure caused by a liquid column.pressure, p (pascals, Pa) =
height, h (metres, m) X
density, ρ (kilograms per cubic metre, m2) X
gravitational field strength, g (newtons per kilogram, N/kg) - 8Why atmosphere exerts a pressureAir molecules collide with surfaces and create pressure on them
- 9How and why atmospheric pressure changes with altitudeAtmospheric pressure decreases with higher altitude because there is less air above a given altitude.
- 10How the density of the atmosphere changes with altitudeThe density of the atmosphere decreases with increasing altitude.
- 11How to calculate the force on a flat object due to a pressure differenceThe force on a flat object due to a pressure difference = the pressure difference X the area of the flat
- 12What is meant by an upthrust on an object in a fluidThe upthrust on an object in a fluid us an upward force on the object due to the fluid.
- 13What causes an upthrustThe upthrust of an object in a fluid is caused by the pressure of the fluid.
- 14What the pressure in a fluid depends onThe pressure at a point in a fluid depends on the density of the fluid and the depth of the fluid at that point.
- 15How to explain whether an object in a fluid floats or sinksAn object sinks if its weight is greater than the upthrust on it when it is fully immersed.`
Information
- Description
- Year 9 Physics Flashcards on Force and Pressure, AQA Chapter 11, created by Miles McIntosh on 23/12/2017.
- Created by
- Miles McIntosh
- Views
- 1
- Rating