1. Not finding help here? Sign up for a free 30min 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!

Simple harmonic motion

  1. Oct 12, 2006 #1
    hey guys, just hpoping sum1 could point me in the rite direction....i cant wrk out how to proove v^2=n^2 (A^2-x^2) from

    v dv/dx = -n^2x

    obviously you hav to integrate...but i dont know how they get the A into the equation??

    what i hav tried is intergating both sides with recpect to x first

    v dv/dx x = (-n^2x^2)/2 and given we know dv/dx . dx/ dt = -n^2x and v = dx/dt the sub in to have

    .....well it brings me no where actually hence this post

    thanks for you help
  2. jcsd
  3. Oct 12, 2006 #2


    User Avatar

    Integrate both sides wrt x, giving you:

    integral v dv = -n^2 integral x dx. This, with intial conditions( v=0 at x = a), gives you the required quadratic.

    Next up,

    learn to spell and write English.
  4. Oct 12, 2006 #3
    well thanks for that, and im sorry about the english....just typing quickly and didn't realise correct grammer is required in a Maths forum....but never the less thanks
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Simple harmonic motion
  1. Harmonic Functions (Replies: 7)