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Homework Help: Revolutions Help!

  1. Apr 14, 2009 #1
    1. The problem statement, all variables and given/known data
    Sam drops his ring in the mall. It goes rolling away from him at a velocity of 3.0 m/s. It has a radius of 0.50cm. After rolling 1.0 m how many revolutions has it made?

    2. Relevant equations
    vcm= rw

    3. The attempt at a solution
    3.0x 2 pi = 18.84
    0.50x 18.84= 9.42
  2. jcsd
  3. Apr 14, 2009 #2


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    Homework Helper

    Welcome to PF.

    How do you see the velocity affecting the number of revolutions?

    If the circumference is 2*.5*π ... or π cm, then isn't the number of revolutions the number of circumferences it has traversed? 100 cm / π cm ?
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