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

This is just a short response problem on my homework. It asks:

"If a particle is moving at a relativistic velocity, is the following equation still valid?

|q|vB = mv^{2}/r

If the particle is an electron, what is the value of the mass?" (electron mass = 9.1094x10^{-31})

2. Relevant equations

|q|vB = mv^{2}/r

3. The attempt at a solution

I would think that the equation still applies. Velocity is relative so it does not change when the frame of reference changes. Is that correct? Would I also just use the given electron mass for the mass? Maybe I'm thinking too much... Would .511MeV/c^{2}work too?

One side question. Would the radius be a contracted length? How would that be calculated? Any help is greatly appreciated. Thank you so much!

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# Homework Help: Relativistic particle in magnetic field

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