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Force and centripetal motion

  1. Sep 29, 2016 #1
    1. The problem statement, all variables and given/known data

    https://www.physicsforums.com/attachments/bolt-png.106701/ [Broken]
    2. Relevant equations
    F=ma
    v=d/t
    centripetal accel=v^2/r
    basic circle formulas

    3. The attempt at a solution
    Firstly to figure the rot/sec of the rod
    2040/8= 255 rotations per second
    Then multiplying the 255 rotations by the circumference of the bolt to find the velocity
    2pi(.036m)= .226 m
    .226*255=57.63 m/s
    Using the centripetal acceleration formula to find acceleration
    57.63^2/.226= 14695.65 m/s/s
    Using F=ma
    F=.032kg(14695.65 m/s/s)
    F=470.26 N
     
    Last edited by a moderator: May 8, 2017
  2. jcsd
  3. Sep 29, 2016 #2
    Yeah I divided by the circumference instead of the radius in the acceleration formula. I guess I need to be more organized in my work.
    57.68^2/.036=92416.18
    F=92416.18(.032)=2957.32
     
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