Question

how much pressure will a man of 80kgf exert on the ground if 1.he is lying on the ground 2.he is standing on his feet?given that the area of the body of the man is 0.6m^2 and that of a foot is 80cm^2? please answer this questtion for me!!

Answer 1

The formula for calculating the amount of exerted is=force/area

unit of pressure is=Newton(N)/m^2

here, force is 80 kgf

the area of the body is 0.6m^2

according to the formula.

pressure = 80/0.6 N/m^2 =133  1/3 N/m^2≈133N/m^2

this is the pressure exerted when he is lying.

area of one foot=80 cm^2=.008 m^2

area of 2 feet=2 * .008 m^2=.016 m^2

pressure=80/.016 N/m^2=5000N/m^2

this is the pressure exerted when he is standing.