Which situation has the greatest pressure? A. Atmospheric pressure at sea level, equal to 1.01 X 105 N/m2 B. The pressure that a person of mass 70 kg exerts on the floor when she balances on the ball of one foot, with an area of contact of 50 cm2 C. The pressure that a physics textbook of mass 2.5 kg exerts on a desk when it is lying flat on the desk, with an area of contact of 22 cm X 28 cm

The correct option is B

Explanation:

In part A pressure is given as

In Part B we can calculate the pressure using the formula

Where F is the force which in this case is weight which can be obtained as follow

            W = Mg

Substituting 70kg for M and for g

A is the area with a value

So substituting into the above equation

for part c

    A  

     F  

Therefore

From this we see that the value of P for part B is the greatest

see earlier