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Finding accelration with forces?

  1. Oct 23, 2008 #1
    1. The problem statement, all variables and given/known data
    Find the acceleration that the cart in Figure 6-38 must have in order for the cereal box not to fall. Assume that the coefficient of static friction between the cart and the box is 0.40.

    ** the cereal box is at the front of the wagon (outside the wagon)
    2. Relevant equations

    I know fs/N= coeffiecnt or .4 but i am unaware of how you find N or fs, please explain
     
  2. jcsd
  3. Oct 24, 2008 #2

    LowlyPion

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    Homework Helper

    If I understand your picture that I can't see, draw a force diagram. You have the m*g down and you have the force from acceleration normal to the side and that force times the u of friction must balance the downward force of gravity.
     
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