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Dynamics - vertical spring and horizontal pendulum problem

  1. Jan 15, 2008 #1
    having my brain fried with some dynamics problems for uni and my lecturer is on holiday so I dont have anyone to ask.

    Currently working on un-dampned vibration and simple harmonic motion and I can work out basic questions such as a weight hanging on a spring but when it starts to involve rotation as well I just cant seem to get my head round it.


    this is the type of question I mean:

    [​IMG]

    any help with this would be greatly appreciated!

    EDIT:

    is there any way of simplifying the problem in a similar way to parralell/seris spring problems? or is this too simple a problem to simplify!?!

    ive been trying to rething th problem as a massless wheel of radius L with a tangental downards force (forcing the wheel clockwise) of WL Sin (theta) and a tangental upwards force (anti-clockwise) of Ka Sin(theta)

    am I making fundametal/retarded misstakes or is this the completely wrong way to go about it?
     
    Last edited: Jan 15, 2008
  2. jcsd
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