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Three blocks rest on a frictionless, horizontal table (see figure below), with m1 = 8 kg and m3 = 20 kg. A horizontal force F = 101 N is applied to block 1, and the acceleration of all three blocks is found to be 3.5 m/s2.

Find m2.
What is the normal force between blocks 2 and 3?

  • Physics -

    F = (m1 + m2 + m3) a
    You already know m1 and m3, a and F.

    Solve for m2.

    The force between blocks 2 and 3 is what acclerates m3. That force is m3*a

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