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Homework Help: Porblem about dynamic applications of torque

  1. Jul 19, 2004 #1
    Hi, Im working on the following problem:

    A 2.85kg bucket is attached to a disk shaped pulley of radius 0.121m and mass of 0.742 kg. If the bucket is allowed to fall,
    what is:
    linear acceleration, angular acceleration of pulley and,
    how far does the bucket drop in 1.5 s?

    so far i solved for I = 1/2mr^2

    = 1/2 (0.742) 1.21^2
    =.0054
    now im not sure how to get the linear acceleration

    any tips? :smile:
     
  2. jcsd
  3. Jul 19, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Start by identifying the forces acting on the pulley and on the bucket. Then apply Newton's 2nd law to each object. (Hint: since the two objects are connected by a rope, how must their accelerations relate to each other?)
     
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