ABSTRACT
Problem 2. Calculate the force exerted by the atmosphere on a pool of water that is 30 m long by 10 m wide, when the atmospheric pressure is 100 kPa
From above, pressure = force area
hence, force = pressure × area. The area of the pool is 30 m × 10 m = 300 m2. Thus, force on pool F = pressure × area
= 100 kPa × 300 m2 and since 1 Pa = 1 N/m2,
F = (100 × 103) N m2
× 300 m2 = 3 × 107 N = 30 × 106 N = 30 MN
That is, the force on the pool of water is 30 MN.
