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WAEC Further Mathematics 2014 Question 36

Question 36

Dynamics

A ball is thrown vertically upwards with a velocity of 15 ms−1. Calculate the maximum height reached. [Take g = 10 ms−2]

  1. A.15.25m
  2. B.13.25m
  3. C.11.25m
  4. D.10.25m
Show the answer and explanation

Answer: C (11.25m)

Explanation

At the top v = 0: 0 = 15² − 2(10)H, so H = 225/20 = 11.25 m.