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JAMB Physics 2011 Question 7

Question 7

Motion

If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object? [g ≈ 10 ms−2]

  1. A.45 m
  2. B.60 m
  3. C.90 m
  4. D.30 m
Show the answer and explanation

Answer: A (45 m)

Explanation

Starting from rest, h = ½gt2 = ½ × 10 × 32 = 45 m.