# Important Information About Relativistic Energy and Momentum

1. Given: The charge on the electron is

qe = 1.60218 *10 ^-19 C.

Given: The mass of the electron is

me = 9.10939 * 10 ^-31 kg.

What is an electron's momentum, if it is

accelerated across a 6 mm potential difference

of 220 kV? Answer in units of keV/c.

2. Determine the energy required to accelerate

an electron from 0.587 c to 0.65 c . Answer in

units of MeV.

https://brainmass.com/physics/acceleration/relativistic-energy-momentum-145434

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#### Solution Summary

I have found the relativistic momentum of an electron upon acceleration through a large potential difference. I also have found the change in its total relativistic energy. This is a classic problem encountered often in special theory of relativity.