Question

When we stand on loose sand, our feet go deep into the sand. But when we lie down on the sand our body does not go that deep into the sand. But when we lie down on the sand our body does not go that deep in the sand. Why?

Answer 1

As pressure$=\frac{Force}{Area}$

$\Rightarrow$ Pressure $\propto \frac{1}{Area}$

If we stand, we apply more pressure than when we are lying down due to less area of contact(Force$=$weight$=$constant).