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Homework Help: Simple physics

  1. Jan 22, 2010 #1
    1. The problem statement, all variables and given/known data

    A box with a mass of 12kg rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is 0.50. The box is connected to a rope that passes around a pulley and suspends a second box of mass 24kg. What is the acceleration of the second box?

    2. Relevant equations



    3. The attempt at a solution

    A) 9.8m/s2 [down]
    B) 6.5m/s2 [down]
    C) 0.5m/s2 [down]
    D) 4.9m/s2 [down]

    which one?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jan 22, 2010 #2

    fluidistic

    User Avatar
    Gold Member

    First of all, welcome to PF!
    Second, here you must show an attempt, otherwise we don't have a clue about where you're stuck.
    Regarding the problem, I suggest you to draw a free body diagram for each block and use the fact that the net force is worth mass times acceleration. (Newton' second's Law)
     
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