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Homework Help: Angular acceleration!

  1. May 24, 2014 #1
    1. The problem statement, all variables and given/known data

    If a dynamometer is set to move at 180 deg/s and it takes 0.18 seconds to reach that speed. What was the angular acceleration of the test arm in radians/s/s to get to that velocity? Give your answer rounded to two decimal places and do not include units in answer.

    2. Relevant equations

    angular acceleration (a) = change in angular velocity (w)/change in time (t)
    a = w/t

    3. The attempt at a solution

    t = 0.18s
    w = 180deg/s
    a = ?

    a = w/t
    a = 180/0.18
    a = 16.67

    To find radians, 16.67/57.3 = 0.29 rad/s/s.

    Is this correct?

    Thank you for your help! :)
  2. jcsd
  3. May 24, 2014 #2
    Looks right to me.
  4. May 24, 2014 #3
    Thank you!

    Can anyone else see a problem with this?
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