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: Finding mass of spring (SHM)

  1. Dec 2, 2007 #1
    Hi there, I just want to confirm my answer: A mass "M" is set oscillating on a spring of mass "[tex]m_{s}[/tex]". If the total mass of the system is given by:

    Derive an expression for [tex]m_{s}[/tex].

    Well first off:



    & E = K + U ,where E is constant

    So I just get the time derivative:

    [M+[tex]\frac{m_{s}}{3}[/tex]]a + kv = 0 ,where
    [tex]v = \omega A cos \omega t[/tex]
    [tex]a = -\omega^{2}A sin \omega t[/tex]

    Then I just solve for [tex]m_{s}[/tex]

    I'm pretty sure it's right, but I'd just like some confirmation.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted