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!

Rotational dynamics rod- !

  1. Mar 10, 2010 #1
    rotational dynamics rod--plz help!

    1. The problem statement, all variables and given/known data
    A thin rod of length l and mass m is fixed at a far ends by a free pivot and held from rotating with a string attached at 3/4l and fixed toa ceiling. The moment of inertia of a thin rod about a far end is ml2/3

    a) what is the pivot point exerting on the rod

    The rope is cut at t =0 seconds. at t =0 seconds find:
    b) the angular acceleration of the rod.
    c) the transverse acceleration of the rod's center of mass.
    d) the transverse aceleration of point A (the far end of the rod)
    e) the force exerted by the pivot point

    picture is attached.
     

    Attached Files:

  2. jcsd
  3. Mar 10, 2010 #2

    ideasrule

    User Avatar
    Homework Helper

    Re: rotational dynamics rod--plz help!

    You have to at least try the problem and explain your thoughts before asking for help.
     
  4. Mar 10, 2010 #3
    Re: rotational dynamics rod--plz help!

    First, total downward torque = upward torque.
    .5mgl + Torque of pivot point = .75mgl
    torque of pivot point = .25mgl.
    This doesnt make sense because the pivot point cant exert a torque.
    Thats all I got to...and I couldnt figure out anthing else lol
    I have all the answers, I just need to understand hwo to do it.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Rotational dynamics rod- !
  1. Rotating rod (Replies: 5)

  2. Rotation of a rod (Replies: 3)

Loading...