# Question #97f22

Mar 18, 2016

$1 l b / f {t}^{2}$

#### Explanation:

Pressure is defined as Force per unit area.

In the problem:

Weight $m g = 20 l b$
Area of the block of wood in contact with the table $5 \times 4 = 20 f {t}^{2}$

Pressure exerted $= \text{Force"/"Area"="Weight"/"Area of contact} = \frac{20}{20}$
$\textcolor{w h i t e}{P r e s s u r e e x e r t d} = 1 l b / f {t}^{2}$