Lesson: Chapter 15 — Fluid Pressure and Its Applications

15.2. Liquid pressure 4 of 8 Reset answers

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Question 4

A water tank is 2 m deep. What pressure does the water produce at the base of the tank? (density of water = 1000 kg m⁻³; g = 10 m s⁻²)

A 200 000 Pa B 20 000 Pa C 2000 Pa D 2 Pa

The right answer is the one marked above.

20 000 Pa. P = h ρ g = 2 × 1000 × 10 = 20 000 Pa.

2000 Pa comes from leaving out either g or the depth. Always check that all three quantities in the formula — height, density and g — have been multiplied in.

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