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pressure
Pressure = Force ÷ area
If a force of 10 newtons acts on an area of 2m² What pressure
does it exert  
pressure = force ÷ area
pressure = 10 newtons ÷ 2 m²
pressure = 5 newtons/m²
or 5 pascals (Pa)
rearranged versions
Force = pressure x area,    area = force ÷pressure