Noting that pressure is a force over an area P FA and the e

Noting that pressure is a force over an area (P = F/A), and the equation for gravitational force is F = m × g (where m is the mass of a person in kilograms and g = 9.8 m/s2), what pressure (in N/m2, which is also called a Pa) would be exerted if a 65 kg person were sitting on a stool with seat diameter of 12 inches?

Solution

P = Force/Area

Force = mg = 65*9.8 = 637 N

Area = pi*r^2

r = 6 inch = 0.1524 m

Area = 3.14*(0.1524)^2 = 0.0729 m^2

Pressure = 637/0.0729 = 8737.99 N/m^

P = 8738 N.m^2