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    nccaitlin91 Posts: 26, Reputation: 1
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    #1

    Mar 27, 2013, 08:14 AM
    Physics: angular rotation speed
    What I need help with is this problem:

    A point on the tread of a 16 inch (diameter = 0.406 m) tire is moving at 45,000 m/s. What is the angular rotation speed of the tire?

    I know the answer is 2.2 * 10^5 rad/s but I do not understand how to get that. Thank you!
    nccaitlin91's Avatar
    nccaitlin91 Posts: 26, Reputation: 1
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    #2

    Mar 27, 2013, 08:19 AM
    I know w=v/t so it is as simple as w= 45,000/(4.06/2)= 2.21674?
    The diameter instead of radius threw me off I think
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