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JAMB Physics 2004 Question 32

Question 32

Pressure

A man exerts a pressure of 2.8 × 103 Nm−2 on the ground and has 4 × 10−2m2 of his feet in contact with the ground. The weight of the man is

  1. A.112 N.
  2. B.140 N.
  3. C.102 N.
  4. D.70 N.
Show the answer and explanation

Answer: A (112 N.)

Explanation

Weight = pressure × area = 2.8 × 103 × 4 × 10−2 = 112 N.