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JAMB Physics 2012 Question 16

Question 16

Density and Upthrust

An object of volume 1 m3 and mass 2kg is totally immersed in a liquid of density 1 kgm−3. Calculate its apparent weight. [g ≈ 10ms−2]

  1. A.20N
  2. B.10N
  3. C.2N
  4. D.1N.
Show the answer and explanation

Answer: B (10N)

Explanation

Weight = 2 × 10 = 20 N. Upthrust = Vρg = 1 × 1 × 10 = 10 N. Apparent weight = 20 − 10 = 10 N.