01:58
Calculus: Early Transcendentals
In the theory of relativity, the mass of a particle with velocity $ v $ is
$$ m = \frac{m_0}{\sqrt{1 - v^2/c^2}} $$
where $ m_0 $ is the mass of the particle at rest and $ c $ is the speed of light. What happens as $ v \to c^- $?