The atmospheric pressure at sea level is about 1.0 105 Pa. What is the force at sea level that air exerts on the top of a typical office desk, 143 cm long and 79 cm wide?
N
A car tire makes contact with the ground on a rectangular area of 12 cm by 18 cm. The car's mass is 1050 kg. What pressure does the car exert on the ground?
Pa