Post-UTME Physics 2010 Objective — Question 4
Question 4 of 12 from the Post-UTME Screening (Post-UTME) Physics 2010 Objective paper, with the correct answer and a full explanation.
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An object of mass 7kg is moving at a constant velocity of 20ms^-1. Determine the kinetic energy.
- A. 2.2KJ
- B. 140.0KJ
- C. 1.4KJCorrect
- D. 562.5J
Explanation
KE = 1/2 mv^2 = 0.5 x 7 x 20^2 = 0.5 x 7 x 400 = 1400J = 1.4KJ.
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