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Help problem with rolling

  1. Mar 31, 2010 #1
    1. The problem statement, all variables and given/known data

    Plank of mass M = 8 kgr is installed on the same two tubes (very small
    thickness) radius R and mass m = 2 kgr. Initially the system property. A horizontal
    force F = 40 N applied to the board and the tubes rolled without sliding (Ic = mR^2).
    When the board shifted s = 2m on the ground calculate:

    a. the speed of the board
    b. the acceleration of the board
    c. the friction between board and the tubes
    d. the friction between tubes and floor


    3. The attempt at a solution

    Ι have found the speed of the board but i don't know how to find the acceleration.
     

    Attached Files:

  2. jcsd
  3. Mar 31, 2010 #2

    tiny-tim

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    Homework Helper

    Welcome to PF!

    Hi costas! Welcome to PF! :smile:
    If you have found v as a function of s, then obviously you know how to get dv/ds, and you can then get dv/dt by using the chain rule :wink:
     
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