JAMB Physics 2013 Objective — Question 9
Question 9 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.
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An object is moving with a velocity of 5ms⁻¹. At what height must a similar body be situated to have a potential energy equal in value with the kinetic energy of the moving body?
- A. 25.0m
- B. 20.0m
- C. 1.3mCorrect
- D. 1.0m
Explanation
P.E = K.E, so mgh = ½mv² → h = v²/2g = 25/(2×10) = 1.25m ≈ 1.3m.
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