Question
Discuss the variation of mass with velocity.
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Answer
By Einstein's theory of relativity $\text{m}=\frac{\text{m}_0}{\sqrt{1\frac{\text{v}_2}{\text{c}^2}}}$ = mass of moving body increases with velocity, because if v is increased $\Rightarrow\frac{\text{v}^2}{\text{c}^2}$ is increased. $\Rightarrow1-\frac{\text{v}^2}{\text{c}^2}\text{ is decreased }$ $\Rightarrow\frac{\text{m}_0}{\sqrt{1\frac{\text{v}^2}{\text{c}^2}}}\text{is increased}.$ If v is zero then $m = m_0$
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