Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I How can I calculate the energy of a body of mass?

  1. Nov 1, 2018 #1
    Since E = mc2 the if I know the mass and the energy I can figure out the constant c2, but how do I know how much energy does the body have ? How do I calculate it ?
     
  2. jcsd
  3. Nov 1, 2018 #2

    PeroK

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Normally you would measure its rest mass, ##m##, and multiply by ##c^2##. That would give you the rest energy, ##E##.

    These days ##c## is defined to have a certain value. So, you don't calculate it from other quantities, or from experiment.
     
  4. Nov 1, 2018 #3
    thanks
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted