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/m^{2})

or

Newtons per centimetres squared (N/cm^{2})

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