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Block attached to a cord on an inclined plane

  1. Sep 24, 2016 #1
    1. The problem statement, all variables and given/known data
    I have a block of mass M attached to a cord of mass m on an inclined plane of angle θ . A force F is pulling the cord & block up the plane. I have to find the force exerted on the block by the cord. The surface is frictionless

    2. Relevant equations
    F = ma

    3. The attempt at a solution
    So far I have tried to figure all of the forces that are acting on the system and place them in the F=ma equation. This is what I have come up with:
    (M+m)gsinθ-F+Fc=(M+m)a
    where Fc is the force exerted by the cord.
    Otherwise, I am unsure of how to proceed.
     
  2. jcsd
  3. Sep 24, 2016 #2

    Doc Al

    User Avatar

    Staff: Mentor

    It's not clear what system you are analyzing with this equation.

    Do this: Analyze the 'block + rope' system; get a force equation. Then analyze the block alone to get your second equation.
     
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