Determine the force of oil pressure on a 10 cm2 plug in the bottom of the tank if the oil level is 1.5 m high.

Data: S (the surface area of the plug, on which the oil exerts pressure) = 10 cm2 (10 * 10 ^ -4 m2); h (height of the oil level in the tank) = 1.5 m.

Reference data: g (acceleration due to gravity) = 9.81 m / s2 ≈ 10 m / s2; ρ (oil density) = 800 kg / m3.

1) Determine the pressure that oil creates: P = ρ * g * g = 800 * 10 * 1.5 = 12000 Pa.

2) Calculate the force of oil pressure on the plug: P = F / S, whence F = P * S = 12000 * 10 * 10 ^ -4 = 12 N.

Answer: Oil exerts a pressure on the plug with a force of 12 N.