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Homework Help: Torsional Problem with gears

  1. May 8, 2016 #1
    Hi, this is a question from a previous past paper that I am having trouble with. Am I meant to just use the number of teeth from each gear to find a ratio and use this to find the effective inertia at point C. Then use this to find a torque and take away the torque of the constant load.
    My exam is tomorrow so any help would be greatly appreciated.

    Here is my working

    Last edited: May 8, 2016
  2. jcsd
  3. May 10, 2016 #2


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    Your notation is confusing... Ib=Ib+Ia(r^2)?!
    More importantly, you are thinking about the ratios wrongly. As gear B turns once, how often does gear A turn?
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