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Unilorin Post-UTME Physics 2024 (Model questions) Question 3

Question 3

Density and Upthrust

An object weighs 10N in air and 7N when completely immersed in water. What is the relative density of the object?

  1. A.2.5
  2. B.3.33
  3. C.5.0
  4. D.16.0
Show the answer and explanation

Answer: B (3.33)

Explanation

Relative density = weight in air ÷ loss of weight in water = 10 ÷ (10 − 7) = 10 ÷ 3 = 3.33.