How can we calculate are using the pressure equation?
Area = Force ÷ Pressure
How do we calculate pressure?
Pressure = Force ÷ Area
What are the units of pressure?
Newton per metres squared (N/m2)
or
Newtons per centimetres squared (N/cm2)
If your decrease the area that a force is acting over you will ______ the pressure.
If your decrease the area that a force is acting over you will increase the pressure.
Define pressure.
When a force acts over an area.
When you stand on a surface you exert a ______ on the surface.
pressure
How can we calculate force using the pressure equation?
Force = Pressure x Area
If you increase the area that a force is acting over you will ______ the pressure.
If your increase the area that a force is acting over you will decrease the pressure.
What is the force that is acting on the ground where you stand?
Your weight
A hydraulic jack is a machine that is used to lift cars. See diagram below. Describe and explain what would happen if there were bubbles of air in the oil.
- The output cylinder under the car would not move up
- Because when you press the handle you compress the oil
- So the air bubbles would be compressed and the force would not be transmitted
