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JAMB Physics 2009 Question 5

Question 5

Motion

A car accelerates uniformly from rest at 4ms−2. How far will it travel in the fifth complete second?

  1. A.100 m
  2. B.50 m
  3. C.32 m
  4. D.18 m
Show the answer and explanation

Answer: D (18 m)

Explanation

Distance in 5 s = ½ × 4 × 52 = 50 m; distance in 4 s = ½ × 4 × 42 = 32 m. In the fifth second it travels 50 − 32 = 18 m.