1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Special Relativity problem -- An electron travels at 0.422c...

  1. Mar 15, 2016 #1
    1. The problem statement, all variables and given/known data
    An electron travels at 0.422c. Calculate the following.
    (a) the relativistic momentum
    kg · m/s

    (b) the relativistic kinetic energy

    (c) the rest mass energy

    (d) the total energy of the electron

    2. Relevant equations
    p= Ɣmu
    p= mv/ sqrt(1-v^2/c^2)

    3. The attempt at a solution
    p= 1/ sqrt(1-.422c/c^2) *(.422c)(0)
    = 5.51e-01
  2. jcsd
  3. Mar 15, 2016 #2
    use the rest mass of the electron to get correct momentum.
    write out the other relations/formula to calculate the other parameters.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted