# Relativistic Mass

on . Posted in Classical Mechanics

Relativistic mass, abbreviated as $$m_r$$, refers to the mass of a body which changes with the speed of the body as this speed approaches close to the speed of light.

## Relativistic Mass formula

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

### Where:

 Units English Metric $$\large{ m_r }$$ = relativistic mass $$\large{ lbm}$$ $$\large{ kg}$$ $$\large{ m }$$ = rest mass $$\large{ lbm}$$ $$\large{ kg}$$ $$\large{ c }$$ = speed of light $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$\large{ v }$$ = velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$

Tags: Mass Equations