Special Relativity problem -- An electron travels at 0.422c....

[Rayonna]

Homework Statement

An electron travels at 0.422c. Calculate the following.
(a) the relativistic momentum
kg · m/s

(b) the relativistic kinetic energy
J

(c) the rest mass energy
J

(d) the total energy of the electron
J

Homework Equations

p= Ɣmu
p= mv/ sqrt(1-v^2/c^2)

The Attempt at a Solution

a.
p= 1/ sqrt(1-.422c/c^2) *(.422c)(0)
= 5.51e-01

 

[drvrm]

use the rest mass of the electron to get correct momentum.
write out the other relations/formula to calculate the other parameters.