(scratch space)
E 2 = c 2 p 2 + m 2 c 4 {\displaystyle E^{2}=c^{2}p^{2}+m^{2}c^{4}}
K E = ( γ − 1 ) m c 2 {\displaystyle KE=(\gamma -1)mc^{2}}
E = γ m c 2 {\displaystyle E=\gamma mc^{2}}
γ = 1 1 − ( v c ) 2 {\displaystyle \gamma ={\frac {1}{\sqrt {1-\left({\frac {v}{c}}\right)^{2}}}}}
