In a tank filled with water, at a depth of 2 meters, there is a tap, the area of which is 2 cm². With what force does the water press on the piston of this tap?
h = 2 m.
S = 2 cm² = 0.0002 m².
ρ = 1000 kg / m ^ 3.
g = 9.8 m / s ^ 2.
F = p * S.
p = ρ * g * h.
F = ρ * g * h * S.
F = 1000 kg / m ^ 3 * 9.8 m / s ^ 2 * 2 m * 0.0002 m2 = 3.92 N.
Answer: water presses on the valve piston with a force of F = 3.92 N.
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