Comparing Example 12.1 (Section 12.1) and Example 12.2 (Section 12.2), it seems that 700 N of air is exerting a downward force of 2.0 × 106 N on the floor. How is this possible?
Solution 3DQ Step 1 of 2: Inside the living room we have air, as air is in gaseous state; the atoms are molecules in gaseous are free to move in random direction. So the air molecules inside the room, tends to move in random direction with some greater speeds. Some of the air molecules near the walls and floor hits the walls and floor during their random motion. As this air molecules repeatedly hits or collides with the floor, they create some pressure on the pressure. Pressure is defined as the force per unit area, F P = A Therefore, the pressure created by the air molecules will exert some force on the floor, which depends on the mass as well as the density of air.