1. Limited time only! Sign up for a free 30min personal 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!

Centripetal Force (RPM Question!)

  1. Nov 2, 2011 #1
    1. The problem statement, all variables and given/known data
    A coin is placed 18cm from the axis of a rotating turntable of variable speeds. If the coefficient of friction is 0.68, what is the maximum r.p.m that the coin can handle before sliding off?


    2. Relevant equations
    This is basically what I need..
    I know there's mv^2/r
    But which equation do I need for RPM questions?


    3. The attempt at a solution
    None at the moment, not sure of the equation I'm supposed to use :S
     
  2. jcsd
  3. Nov 2, 2011 #2

    PeterO

    User Avatar
    Homework Helper

    As well as mv2/r there is 4∏2rm/T2 where T = period

    Since frequency is 1/T that would mean 4∏2rmf2

    frequency means revolutions per second. r.p.m is revolutions per minute.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Centripetal Force (RPM Question!)
Loading...