Question

A block weighing 400 N is placed on the ground. Calculate the pressure exerted by the block on the ground?

• A. $20N{m}^{-2}$
• B. $4N{m}^{-2}$
• C. $400N{m}^{-2}$
• D. $40N{m}^{-2}$

Answer 1

The correct option is D $40N{m}^{-2}$

Force acting = Weight = 400 N
Length of the block, L = 5 m
Width of the block, W = 2 m
Area covered by the block $=L\times W=5\times 2=10m^2$
Pressure is force per unit area.
Pressure $=\frac{Weight}{Area}$
$=\frac{400}{10}$
$=40N{m}^{-2}$