The unit of pressure is N/m2 or pascal, Pa.
1 N/m2 = 1 Pa
For smaller areas, the units N/cm2 and N/mm2 are also used for pressure.
Pressure is only in pascals, Pa, when the force is in N and the area is in m2.
A pressure of 50 Pa means that a force of 50 N acts over an area of 1 m2.
Calculate the pressure exerted by a paving slab of weight 250 N if the area of contact with the ground is 1.25 m2.
F = 250 N
A = 1.25 m2
p = 200 Pa
The pressure exerted by the paving slab is 200 Pa.