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: Orbiting particle with given potential. Find the total energy. Need help!

  1. May 24, 2009 #1
    1. The problem statement, all variables and given/known data

    (a) A light particle of mass m orbits in a circular orbit around a massive attractive centre with a potential that is given by

    V(r) = Cr^2

    (b) Using the equations for circular motion show that the total energy of such a particle must be given by

    E = 2Cr^2

    Use the Bohr postulate for the quantization L = mvr = nh(bar) in combination with the answer to part (a) to arrive at an expression for the energy associated with the allowed orbits in terms of the mass of the particle n and other constants.

    I have no idea how to even begin this!

    ANY help would be deeply appreciated!

  2. jcsd
  3. May 25, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi PanosP ! Welcome to PF! :smile:

    (try using the X2 tag just above the Reply box :wink:)
    Find the force from V(r), then use good ol' https://www.physicsforums.com/library.php?do=view_item&itemid=26" :smile:
    Last edited by a moderator: Apr 24, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook