Pressure

2. Pressure in solids
An elephant will exert less
pressure than a person
wearing high heels. This is
because the weight of the
elephant is spread over a
larger surface area.
Sir jumps quickly to his feet
He’s got the point (-he’s got a scar!)
The pressure acting on his seat,
Is force per unit areaaaaaaaaagh!

3. Pressure is Force per Unit Area
Force ÷ Area = Pressure
Measured in N/m2 or N/cm2
N/m2 = 1Pa (pascal)

4. Pressure in solids
This man can lie on a bed of nails because by having many nails
he has increased the surface area so his pressure is less.

5. Increasing
pressure

6. Reducing
pressure

7. Reducing Pressure
These are all examples of where pressure in
reduced by increasing surface area

8. Increasing pressure

9. Pressure in solids
It acts in the direction of the force
only.
The smaller the area the higher the
pressure.
The larger the area the smaller the
pressure

11. Calculating pressure

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