1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Velocity frequency and period

  1. Mar 26, 2012 #1
    1. The problem statement, all variables and given/known data
    im confused on something. if the period is the amount of time to make 1 spin once, and the frequency is the inverse of that, i dont understand how frequency isnt the same thing as centripetal velocity.
     
  2. jcsd
  3. Mar 26, 2012 #2

    PeterO

    User Avatar
    Homework Helper

    I have heard of Centripetal acceleration, but never centripetal velocity??

    Do you perhaps mean angular velocity ω - which I have often seen written in radians per second, not (full) cycles per second, so they would vary by a factor of 2∏
     
  4. Mar 26, 2012 #3

    gneill

    User Avatar

    Staff: Mentor

    Perhaps because there's no such thing as centripetal velocity? :smile:

    Are you thinking of angular velocity? The units of that are radians per second. This is not the same thing as cycles per second (frequency), since in rotational motion a "cycle" comprises ##2\pi## radians of angular distance. Thus ω = ##2\pi f##.
     
  5. Mar 26, 2012 #4
    wait...can angular velocity be calculated in revs/minute, or radians/sec? i thought that the revs/min was "centripetal velocity", and radians/sec was angular velocity
     
  6. Mar 26, 2012 #5

    gneill

    User Avatar

    Staff: Mentor

    RPM, RPS, and radians/sec are all measures of angular velocity. They are all related by conversion actors. A "revolution" is ##2 \pi## radians.
     
  7. Mar 26, 2012 #6
    oh...didnt know that
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Velocity frequency and period
  1. Frequency and period (Replies: 5)

Loading...