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WAEC Further Mathematics 2026 Question 36

Question 36

Statics

A boy of weight 78N sits on a bag of cement weighing 50 kg. Find the reaction of the ground on the bag of cement and the boy. [Take g = 10 ms−2]

  1. A.830 N
  2. B.578 N
  3. C.500 N
  4. D.422 N
Show the answer and explanation

Answer: B (578 N)

Explanation

The ground supports both: the bag's weight is 50 × 10 = 500 N, plus the boy's 78 N, so the reaction is 578 N.