A perpendicular force exerts a pressure of 500 Pa on an area of 0.5m². Calculate the force exerted on the surface.

Given:
$\text{P}=500\text{Pa}$ 
$\text{A}=\text{0}\text{.5}\text{}{\text{m}}^2$

To find: Force

Formula: 
$Pressure=\frac{Force }{Area}$

Solution:
We know that the pressure is given by perpendicular force exerted per unit area. We can calculate the force by rearranging the terms as follows:
$\text{F}=\text{P}\times \text{A}$
$\mathrm{F}=\text{500}\times \text{0}\text{.5}$
$\text{F}=\text{250 N}$
Therefore the correct option is D.