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How do you find the acceleration of block B

  1. Nov 6, 2013 #1
    1. The problem statement, all variables and given/known data
    Block A sitting on top of block B
    has a mass mA = 10 kg and is attached to the wall by mass less string.
    Block B, mass mB = 35 kg, is pulled by a force F = 80 N. The surface
    under block B is frictionless. If the coefficients of friction for block A
    and B areμs = 0.4 and μk = 0.1, then the acceleration (in m/s2) of
    block B is


    2. Relevant equations
    ma=sigma(F)

    3. The attempt at a solution
    i got my answer as 1.2
    but its wrong
     
  2. jcsd
  3. Nov 6, 2013 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi houssamxd! :wink:

    show us your full calculations, and then we'll see what went wrong, and we'll know how to help! :smile:
     
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