How do you explain the fact that Energy is conserved but the mass doesn't do if they exist a equivalent relation between them and the energy is conserved to all observers?
Is the mass a quantity conserved in a collision elastic relativistic ? "collision is elastic if they leave the same particles entering" so,I want to know if i can write this:
Suppose a rest-mass $m_o$ with collides elastically with other rest-mass $m_o$ stationary
- Total energy is conserved: $E_1 +E_2 = E_1' + E_2' $ $$ \gamma m_o c^2 = \gamma_1 m_oc^2 + \gamma_2 m_o c^2$$