1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Advanced SHM?

  1. Sep 5, 2014 #1
    I have a homework problem I need help with. I don't want the answer given to me since I know I can answer it with the proper guidance.
    How should I approach this problem?

    ImageUploadedByPhysics Forums1409893185.944767.jpg

    This is what I have so far. How should I approach this? Did I start off right?
    ImageUploadedByPhysics Forums1409893621.787673.jpg
    Thanks in advanced!
  2. jcsd
  3. Sep 5, 2014 #2
    Sorry thought this was the homework section
  4. Sep 5, 2014 #3


    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    hi there

    can you please rotate and repost your images so I don't have to lie down to try and read them :)


    PS have asked for it to be moved to homework section
  5. Sep 5, 2014 #4


    User Avatar
    Gold Member

    We have:
    [itex] x=\alpha \cos{(\omega t-\phi)} \Rightarrow \dot x=-\alpha \omega \sin{(\omega t-\phi)} [/itex]
    Let's take [itex] \delta=\omega t-\phi [/itex], then we can write:
    [itex] \sin^2 \delta+\cos^2 \delta=1 \Rightarrow (\frac{\dot x}{\alpha \omega})^2+(\frac{x}{\alpha})^2=1 [/itex].
    Is it enough or I should explain further?
  6. Sep 5, 2014 #5

    Mhmm let me see what I can extrapolate from this. Give me a moment... Thanks btw.
  7. Sep 5, 2014 #6

    Okay! I will take a better picture!
  8. Sep 5, 2014 #7


    User Avatar
    Staff Emeritus
    Science Advisor

    Since this has been reposted in the HW section, I will close this thread.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook