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Homework Help: Uniform Circular Motion problem

  1. Dec 26, 2004 #1
    there's a 150 lb person on a rolling chair and moves in a circle when a motor with a rope attached on it is hooked up to the chair.

    If the radius of the circle is 7 ft, how much horsepower would the motor need to have to move the person at 1 m/s given that the friction coefficent is about 0.50.

    Can someone give me an idea on how I can try to find how many horsepowers it would take? Thanks
  2. jcsd
  3. Dec 26, 2004 #2
    You are required to find horsePOWER (*hint hint*). What do you know about power?
  4. Dec 26, 2004 #3
    oo power, i think that explains everything then. Just need to find how much work is being done to overcome friction over the time. thanks!
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