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5.5 Pressure and pressure differences in fluids

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Question 7
H

A metal cube hangs from a string and is held fully submerged in water.

density of water = 1000 kg/m3

gravitational field strength, g=9.8 N/kgg = 9.8\ \text{N/kg}g=9.8 N/kg

Figure: A metal cube held fully submerged in water by a string

image

a.

Calculate the pressure due to the water acting on the top face of the cube.

[2]
b.

Calculate the pressure due to the water acting on the bottom face of the cube.

[1]
c.

Use your answers to parts a) and b) to calculate the upthrust on the cube.

[3]
d.

Explain why the resultant force on the cube from the water acts upwards.

[2]
Markscheme

5.5 Pressure and pressure differences in fluids Questions

  1. GCSE
  2. /Physics
  3. /5.5 Pressure and pressure differences in fluids

41 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.

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