A man exerts a pressure of 2.8 x 103Nm-2 on the ground and has 4…

Physics JAMB 2004

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

  • 102N
  • 70N
  • 140N
  • 112N checkmark

The correct answer is: D

Explanation

Pressure = Force / Area = Weight of the man / Area of his feet
=> 2.8 x 103 = Weight of the man / 4 x 10-2
∴ Weight of the man = 2.8 x 103 x 4 x 10-2
= 112N
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