JAMB Physics 1998 Question 14

Question 14

Pressure

Which of these statements are correct for the pressures in liquids?
I. Pressure in a liquid at a point acts equally in all directions
II. Pressure increases with depth
III. Pressure at a depth depends on the shape of the container
IV. Pressure at the same depth in different liquids are proportional to the densities of the liquids.

  1. A.I, II and III only
  2. B.I, II and IV only
  3. C.I, III and IV only
  4. D.II, III and IV only
Show the answer and explanation

Answer: B (I, II and IV only)

Explanation

Liquid pressure p = hρg acts equally in all directions, grows with depth h and is proportional to density ρ. It does not depend on the container's shape, so III is false.