I thought this mental experiment: consider an inertial frame of reference solidal to a particle moving with velocity v respect to another inertial frame of reference, i gotta find the momentum in the second frame of reference (in the first is 0 since is solidal with the particle)(adsbygoogle = window.adsbygoogle || []).push({});

p= m* dx/dt

And then i plug instead of x and t the lorentz tranformation thwt connects them with t' and x'...

But it doesn't work, where am i wrong? Is that method correct? If not why?

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# B How do we derive p = γmv ?

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