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Homework Help: Rotation and translation (of life importance)

  1. Nov 26, 2009 #1
    A rotating disc moves in the positive direction of the x axis. Find the equation y(X) describing the position of the instantaneous axis of rotation, if at the initial moment the axis C of the disc was located at the point O after which it moved

    (A) with a constant velocity v, while the disc started rotating counterclockwise with a constant angular acceleration (beta) (the initial angular velocity is equal to zero);
    (B) with a constant acceleration (omega) (and the zero initial velocity), while the disc rotates counterclockwise with a constant angular velocity (omega)

    I dont understand it - if the instantaneous axis of rotation always passes through the point of contact between ground and a disc, isn't it like trivial?

    could some1 solve it pls?? its for my gf she will kill me if i dont solve it by the morning. (if shes reading this, go away)
  2. jcsd
  3. Nov 26, 2009 #2


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    Welcome to PF!

    Hi FermatPell! Welcome to PF! :smile:

    (have a beta: β and an omega: ω :wink:)
    I think the disc is flat, not rolling upright. :redface:
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