http://www.ck12.org Chapter 12. Fluid Mechanics
FIGURE 12.3
FIGURE 12.4
Check Your Understanding
A woman of weight 540 N stands on the floor. The area of the bottom of each of her feet is 0. 0135 m^2. What is the
pressure on each of her feet?
Answer: Each foot supports half of her weight, so
F=
540 N
2
=270 N→P=
270 N
0 .0135 m^2= 2. 00 × 104
N
m^2.
Does the answer seem rather large to you? Remember, the answer is given in units ofmN 2. A square meter is a large
area when compared to the area of a person’s foot. In Newtons per square centimeter, the answer is 2. (^00) cmN 2.