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Homework Help: Rotational Motion - I have the answer but I don't know how to get there

  1. Dec 10, 2009 #1
    A torque of 1 N.m is applied to a bike wheel of radius 35 cm and mass 0.75 kg. Treating the wheel as a hoop (I=MR^2)

    A. What is it's angular acceleration? Answer - 10.9 rad/s^2
    B. If the wheel starts from rest, what is its angular speed after 5 seconds? Answer - 54.4 rad/s
    C. How many turns does it do in those 5 seconds? Answer 21.7 turns

    I'm trying to study for my exam, and I'm stuck on this problem for our practice test. My professor gave us answers, but I'm just at a loss as to how to get the answers. Can anyone explain how to solve this problem? Thanks!
  2. jcsd
  3. Dec 10, 2009 #2
    What is the relationship between torque, moment of inertia and angular acceleration?
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