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Homework Help: Trebuchet , rotational K.E.

  1. Nov 27, 2007 #1
    1. The problem statement, all variables and given/known data
    A war-wolf, or trebuchet, is a device used during the Middle Ages to throw rocks at castles and now sometimes used to fling pumpkins and pianos. A simple trebuchet is shown in Figure P8.77. Model it as a stiff rod of negligible mass 3.00 m long and joining particles of mass 60.0 kg and 0.120 kg at its ends. It can turn on a frictionless horizontal axle perpendicular to the rod and 14.0 cm from the particle of larger mass. The rod is released from rest in a horizontal orientation. Find the maximum speed that the object of smaller mass attains.
    Pic: www.s-consolidated.com/graphics/trebuchet.jpg[/URL]

    [b]2. Relevant equations[/b]
    [tex]K = \frac{1}{2} I_{cm} w^2 + \frac{1}{2} M v_{cm}^2[/tex]

    [b]3. The attempt at a solution[/b]

    I am not even sure how to model it yet. I will attempt some things and write them as I go.
    Last edited by a moderator: Apr 23, 2017
  2. jcsd
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