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JAMB Physics 2014 Question 7

Question 7

Motion

A car accelerates uniformly from rest at 3ms−2, its velocity after travelling a distance of 24m is

  1. A.144 ms−1.
  2. B.72 ms−1.
  3. C.36 ms−1.
  4. D.12 ms−1.
Show the answer and explanation

Answer: D (12 ms−1.)

Explanation

v2 = u2 + 2as = 0 + 2 × 3 × 24 = 144, so v = 12 m s−1.