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WAEC Further Mathematics 2020 Question 35

Question 35

Dynamics

The distance(s) in metres covered by a particle in motion at any time, t seconds, is given by S = 120t − 16t2. Find in metres, the distance covered by the body before coming to rest.

  1. A.220
  2. B.222
  3. C.223
  4. D.225
Show the answer and explanation

Answer: D (225)

Explanation

v = 120 − 32t = 0 at t = 3.75 s. S = 450 − 225 = 225 m.