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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!
Pressure is Force per Unit Area 
Force ÷ Area = Pressure 
Measured in N/m2 or N/cm2 
N/m2 = 1Pa (pascal)
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.
Increasing 
pressure
Reducing 
pressure
Reducing Pressure 
These are all examples of where pressure in 
reduced by increasing surface area
Increasing pressure
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
Calculating pressure
Main 
menu

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Pressure