JAMB Physics 2011 Objective — Question 14
Question 14 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.
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An object weighs 22kg in water and 30kg in air. What is the upthrust exerted by the liquid on the object? [g≈10ms⁻²]
- A. A. 220 N
- B. B. 80 NCorrect
- C. C. 50 N
- D. D. 520 N
Explanation
Loss in mass = 30-22 = 8kg. Upthrust = Loss in weight = loss in mass x g = 8x10 = 80N.
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