Question

What are the factors affecting pressure at a point in a liquid?

• A. The depth of that point from the surface.
• B. Area of free surface
• C. The density of the liquid.
• D. Acceleration due to gravity.

Answer 1

Answer: (A), (C), (D)

Acceleration due to gravity.

$P=h\rho g$

The pressure at a point = depth of that point from the surface $\times$ density of fluid $\times$ acceleration due to gravity..

So the pressure will increase as you increase the depth, density of the liquid and acceleration due to gravity and vice-versa.

Note: acceleration due to gravity is usually taken as constant but it actually changes depending on the location. Like gravity at the pole is slightly greater than gravity at the equator.