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WAEC Further Mathematics 2014 Question 32

Question 32

Dynamics

A particle accelerates at 12 ms−2 and travels a distance of 250m in 6 seconds. Find the initial velocity of the particles.

  1. A.5.7 ms−1
  2. B.6.0 ms−1
  3. C.6.0 ms−1
  4. D.77.5 ms−1
Show the answer and explanation

Answer: A (5.7 ms−1)

Explanation

s = ut + ½at²: 250 = 6u + 216, so u = 34/6 ≈ 5.7 m/s.