Question

A boy of weight 500 N has feet with a total area of 200 cm2.
What is the pressure between him and the ground if he stands on both feet?
solution must be with formula.

Answer 1

Pressure p is given by the equation:

p=F/A, where F is the force and A is the area that the force acts upon.

F=500 N

cm² need to be converted to m². We know that there is 10000 cm² in 1 m² so 200 cm² / 10000 cm²=0.02 m².

A=200 cm² = 0.02 m²

Now we need to insert the values into the equation to get the pressure p:

p=500/200=5/2=2.5 N/m²

Also, 1 N/m²=10000 Pa so:

p=2.5 N/m² * 10000 = 25000 Pa

The pressure between the boy and the ground is p=2.5 N/m² or p=25000 Pa.