Question

Who exerts the maximum pressure?

• A. Reno (weight = 500 N) standing on one foot covering an area of 50 $c{m}^2$ on ground.
• B. Sam (weight = 1000 N) standing on two feet covering an area of 100 $c{m}^2$ on ground.
• C. Shervin (weight = 500 N) standing on a pole of negligible weight covering an area of 2 $c{m}^2$ on ground.
• D. Reno (weight = 500 N) standing on a weighing machine of negligible weight covering an area of 40 $c{m}^2$ on ground.

Answer 1

The correct option is C Shervin (weight = 500 N) standing on a pole of negligible weight covering an area of 2 $c{m}^2$ on ground.

By definition pressure is the force acting per unit area.
In case 1, $P_1$ = $\frac{500}{50}$ $=10Nc{m}^{-2}$
In case 2, $P_2$ = $\frac{1000}{100}$ $=10Nc{m}^{-2}$
In case 3, $P_3$ = $\frac{500}{2}$ $=250Nc{m}^{-2}$
In case 4, $P_4$ = $\frac{500}{40}$ $=12.5Nc{m}^{-2}$
So, pressure exerted by Shervin is the maximum.