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Newton's Third Law. Help Pls!

  1. Sep 27, 2007 #1
    1. The problem statement, all variables and given/known data
    Three blocks are stacked on top of each other inside an elevator as shown in the figure.
    Answer the following questions with reference to the eight forces defined as follows.

    the force of the 3kg block on the 2kg block, F of 3 on 2,
    the force of the 2kg block on the 3kg block, F of 2 on 3,
    the force of the 3kg block on the 1kg block, F of 3 on 1,
    the force of the 1kg block on the 3kg block, F of 1 on 3,
    the force of the 2kg block on the 1kg block, F of 2 on 1,
    the force of the 1kg block on the 2kg block, F of 1 on 2,
    the force of the 1kg block on the floor, F of 1 on floor, and
    the force of the floor on the 1kg block, F of floor on 1.

    Assume the elevator is at rest. Rank the magnitude of the forces.
    Rank from largest to smallest.

    __________
    | |
    | |
    | 3 kg |
    |________|
    | |
    | 2 Kg |
    |______ |
    | |
    | 1 kg |
    |______|______

    3. The attempt at a solution
    F of floor on 1 and F 1 on floor, F of 3 on 2 and F of 2 on 3, F of 2 on 1 and F of 1 on 2, F of 3 on 1 and F of 1 on 3.
     
    Last edited: Sep 27, 2007
  2. jcsd
  3. Sep 27, 2007 #2
    can anyone offer any insight if the order stated is correct.
     
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