Question

Please i need the answer(with workings) now.
Calculate the pressure exerted on the ground by a person weighing 70kg whose two feet cover an area of 400cm square.if the man stands on one foot,what is the new pressure he exerts on the ground?

Answer 1

Pressure = Force/Area.


Force = Mass × acceleration.

A man of 70kg will apply a force of

mass × g (acceleration due to gravity)

=> Taking g as 9.8,

70 × 10

= 686N

Now, total area of feet = 400 + 400 = 800 cm²


So pressure = 68/800 = 0.8575 Pascal

Now if he stands on one foot, then area = 400 cm²

=> pressure = 686/400 = 1.715 Pascal.