Relativistic momentum Definition and 103 Threads

help with velocity in relativistic momentum? a proton has 1836 times the rest mass of an electron. At what speed (in c) will an electron have the same momentum as a proton moving at .0180c? -- here's what i have so far------------------------ 1. by using the mass of a proton i...

Classical Physics states that: p=mv So, for special relativity, would momentum be defined in the same manner except m is now equal to the relativistic mass instead of the standard 'rest mass' as used in the classical equation?

Is it alright to say that force = rate of change of relativistic momentum F = [ m0 v2 / (1 - v2^2/c^2)^1/2 - m0 v1/(1 - v1^2/c^2)^1/2 )] / (t2 - t1) and can this relation be used to get sensible results for particles?