P11 - pressure
- Created by: Lucy Hart
- Created on: 13-01-20 19:00
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- P11 Force and Pressure
- P11.1 - Pressure + Surfaces
- pressure = force/area
- units - pascals (Pa), equal to 1N/m2
- pressure - when objects exert forces on each other
- reduce the pressure by spreading weight over a bigger contact area
- P11.2 - pressure in a liquid at rest
- pressure of a liquid increases with depth
- the further the hole is below the level of the water, the greater the force with which jet the leaves the bottle
- pressure a liquid increases with density
- pressure = height x density x gravitational field strength
- p = h x p x g
- pressure = height x density x gravitational field strength
- pressure of a liquid increases with depth
- P11.3 - Atmospheric Pressure
- P11.4 - Upthrust + Floatation
- more the object is lowered into the water, the more water is displaced, the bigger the upthrust
- the volume of displaced is equal to the volume of the object (RP - density)
- upthrust - upward on a force due to the pressure of a liquid
- object floats when its weight is equal or less than the upthrust
- more the object is lowered into the water, the more water is displaced, the bigger the upthrust
- P11.1 - Pressure + Surfaces
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