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Another Friction Problem Help?

  1. Oct 30, 2005 #1
    A box of cheerios and a box of wheaties are accelerated by a horizontal force F applied to the cheerios box. The magnitude of the frictional force on the cheerios box is 2N, and the magnitude of the frictional force on the wheaties box is 4N. If the Magnitude of F is 12N, what is the magnitude of the force on the wheaties box from the cheerios box

    Im not sure if this is right or if this even has anything to do with the problem:

    fk(cheerios) = Mu(k)N
    2N = Mu(k)[9.8 x 1]
    Mu(k)[cheerios] = 0.204N

    Mu(k)[wheaties] = 0.136N

    What do i do to find the answer?
  2. jcsd
  3. Oct 30, 2005 #2
    Anyone ?
  4. Oct 30, 2005 #3


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    Homework Helper

    Are the boxes on top of one another? Please draw a diagram and host it on eg. ImageShack.
  5. Oct 30, 2005 #4
    http://img443.imageshack.us/img443/1299/pic004sg.png [Broken]
    Last edited by a moderator: May 2, 2017
  6. Oct 30, 2005 #5

    Doc Al

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    Staff: Mentor

    Try this:
    (1) Apply Newton's 2nd law to both boxes together. Deduce whatever you can.
    (2) Using what you learned, now apply Newton's 2nd law to one of the boxes separately.
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