Question

What is the force exerted on a surface per unit area

Answer 1

Answer: Pressure

Step-by-step explanation:

The force on an object that is spread over a surface area= force exerted per unit of area. Colliding gas particles in air result in air pressure which is all around us.

Answer 2

Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air molecules above that surface. In the diagram below, the pressure at point "X" increases as the weight of the air above it increases.