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Rework homework help

  1. Dec 9, 2006 #1
    If a wheel is turning at 3.0 rads/s, the time it takes to complete one revolution is about:

    3.0 rads/s X 1 revolution/6.28 rads = .477 revolutions/s
    I just need to get the number of seconds to complete one revolution. Please explain how to go about this just step wise. Thank you.

    The rotational speed of the minute hand of a watch is:

    w= anglular displacement/ time
    w=2pi radian in a circle/ 3600 seconds in one rotation
    The reason I put 3600 seconds in the denominator is because it takes that many seconds for the minute hand of a clock to make one full revolution

    60minutes X 60second= 3600

    Thanks for the help :smile:
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Dec 9, 2006 #2

    Andrew Mason

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    Use: [itex]\omega = 2\pi f = 2\pi/T[/itex] where [itex]\omega[/itex] is the angular speed in radians/sec, f is the frequency or number of revolutions/sec and T is the time for one revolution.

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