WAEC Physics 2015 Objective — Question 14
Question 14 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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A body of mass 1000 kg is released from a height of 10 m above the ground. Determine its kinetic energy just before it strikes the ground. [g = 10 ms⁻²]
- A. 10 J
- B. 10³ J
- C. 10⁴ J
- D. 10⁵ JCorrect
Explanation
By conservation of energy, KE just before impact = initial PE = mgh = 1000×10×10 = 100,000 J = 10⁵ J.
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