A man weighing 50N is standing on a wooden plank of 1m x 0.5m. What will be the pressure exerted by the plank on the ground?

Force = 50 N
Area = 1m x 0.5m = 0.5m²
Pressure= ?

The formula of pressure is given by:
$\mathrm{Pressure} = \frac{\mathrm{Force}}{\mathrm{Area}}$
$\therefore \mathrm{Pressure} = \frac{50 \mathrm{N}}{0.5 {\mathrm{m}}^2}= 100 \mathrm{N}/{\mathrm{m}}^2$

Therefore the pressure exerted by the plank on the ground is 100 N/m².