Relativistic Mass

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	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)