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WAEC Further Mathematics 2007 Question 39

Question 39

Dynamics

A force of 30 N acts at an angle of 60° on a body of mass 6 kg initially at rest on a smooth horizontal plane. Find the distance covered in 10 seconds.

  1. A.125√3 m
  2. B.125 m
  3. C.62.5m
  4. D.25√13 m
Show the answer and explanation

Answer: B (125 m)

Explanation

Horizontal component = 30 cos 60° = 15 N, so a = 15/6 = 2.5 ms⁻². s = ½ × 2.5 × 10² = 125 m.