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Find Angular Velocity when given Angular Acceleration?

  1. Nov 5, 2015 #1
    1. The problem statement, all variables and given/known data
    Starting from rest, a spinning compact disk undergoes an angular acceleration of 5.0 rad/s^2. What is the angular speed of the disk after 3 revolutions?

    2. Relevant equations
    a=Δω/Δt
    ω=Δθ/Δt

    3. The attempt at a solution
    I do not understand how to solve this equation when I am not given a time. I don't have a radius, so I can't find the circumference either. How can I solve this?
     
    Last edited: Nov 5, 2015
  2. jcsd
  3. Nov 5, 2015 #2

    DrClaude

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    Staff: Mentor

    Thread locked pending moderation.
     
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