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WAEC Further Mathematics 2018 Question 35

Question 35

Dynamics

A body of mass 28 g initially at rest is acted upon by a force, F Newtons. If it attains a velocity of 5.4 ms−1 in 18 seconds, find the value of F.

  1. A.0.0082 N
  2. B.0.0084 N
  3. C.0.082 N
  4. D.0.084 N
Show the answer and explanation

Answer: B (0.0084 N)

Explanation

a = 5.4/18 = 0.3 ms⁻²; F = 0.028 × 0.3 = 0.0084 N.