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Homework Help: Rotational Acceleration

  1. Mar 16, 2009 #1
    1. The problem statement, all variables and given/known data

    Suppose a revolving door at the bank is spinning around once every 4 seconds. As you walk through, you push on the door for 3 seconds, which increases the rotational speed so that it rotates once a second. What wat the rotational acceleration due to your push?

    2. Relevant equations

    This is what I have so far.....

    3. The attempt at a solution



    22.5 + 120= 140.5 rev/s
  2. jcsd
  3. Mar 16, 2009 #2


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