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Lesson: Hydrostatic Pressure

In this lesson, we will learn how to calculate the hydrostatic pressure acting at a given depth of liquid from the density and strength of gravity.

Worksheet • 3 Questions

Q1:

Which of the following is the correct expression for hydrostatic pressure?

  • 𝑝 β€”hydrostatic pressure
  • β„Ž β€”height of the liquid
  • 𝜌 β€”density of the liquid
  • 𝑔 β€”acceleration due to gravity
  • A 𝑝 = β„Ž 𝜌 𝑔
  • B 𝑝 = β„Ž 𝑔 𝜌
  • C 𝑝 = β„Ž 𝜌 𝑔
  • D 𝑝 = β„Ž 𝜌 𝑔 2
  • E 𝑝 = 𝑔 𝜌 β„Ž

Q2:

Which of the following is the best general definition of hydrostatic pressure?

  • AThe pressure exerted by a fluid on a point within or on the boundary of the fluid.
  • BThe average pressure exerted by a moving fluid on the walls of its container.
  • CThe buoyant force due to a difference in density between a suspended solid and the surrounding fluid.
  • DThe total weight of a fluid.
  • EThe internal stress on a suspended object at the lowest point in the surrounding fluid.

Q3:

How tall does a column of mercury need to be to exert a pressure of 1 atmosphere at its base? Take the density of mercury as 13.6 g/mL and acceleration due to gravity as 9.81 m/s2.
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