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Conical Pendulum

  1. Sep 27, 2007 #1
    A 3.46 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 13.9 N at an angle theta = 26.0° above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the floor is 0.09. What is the speed of the block 3.5 s after it starts moving?

    I'm having a bit of a problem with this. Mainly because I'm not sure how to answer the question. I got a decimal number less than 1 for the acceleration. Here are my two equations:

    Y: T*sin(theta)-mg=0
    X: F+T*cos(theta)=ma

  2. jcsd
  3. Sep 27, 2007 #2
    It's not centripetal motion, but I'm still having problems.
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