# Surface Tension

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Surface tension, abbreviated as $$\sigma$$ (Greek symbol sigma), is the energy or force at the surface of a liquid that holds it together.

## Surface tension formula

$$\large{ \sigma = \frac{F}{l} }$$
Symbol English Metric
$$\large{ \sigma }$$  (Greek symbol sigma) = surface tension $$\large{\frac{lbf}{ft}}$$ $$\large{\frac{N}{m}}$$
$$\large{ F }$$ = force per unit length $$\large{ lbf }$$ $$\large{N}$$
$$\large{ l }$$ = length in which force acts $$\large{ ft }$$ $$\large{ m }$$