# Relativistic Mass

Written by Jerry Ratzlaff on . Posted in Relativity

Relativistic mass refers to the mass of a body which changes with the speed of the body as this speeds approaches close to the speed of light.

## formula

$$m_r = \frac { m} { \sqrt { \frac {1 - v^2} {c^2} } }$$

Where:

$$m_r$$ = relativistic mass

$$m$$ = rest mass

$$v$$ = velocity

$$c$$ = speed of light