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Homework Help: Power and shaft torque

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data
    I am trying to solve 18-10
    http://img845.imageshack.us/img845/7287/motorf.jpg [Broken]

    2. Relevant equations
    P = Cω

    3. The attempt at a solution
    P = Cω

    1 HP = 746 w
    2.4 HP → 1790.4 w

    C = P/ω = 1790.4 w / 40 rad/s
    C = 44.76 Nm

    I am really stuck with this problem, I don't know how to continue.
    Your help will be appreciated.
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Oct 17, 2011 #2

    Filip Larsen

    User Avatar
    Gold Member

    If you know the power and angular speed of shaft B you would know how to calculate the torque on shaft B. So, that leads to two questions:

    1) Can you find a relation between the angular speed of shaft A and B?

    2) Can you find a relation between the power of shaft A and B?

    What must you assume about the belt for those two relations to be valid?
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