(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the speed of a particle whose total energy is 3 times its rest energy.

2. Relevant equations

[tex]KE = \gamma mc^2 - mc^2[/tex]

3. The attempt at a solution

i let total energy = 3mc^2 and then :

[tex]\gamma mc^2 = KE + mc^2[/tex]

[tex]3mc^2 = KE + mc^2[/tex]

[tex]v = \frac{\sqrt{3}}{2} c[/tex]

Is this correct? or should i let [tex]\gamma mc^2 = 3mc^2[/tex] and work it out immediately?

Any help will be appreciated.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Relativity : relativistic energy

**Physics Forums | Science Articles, Homework Help, Discussion**