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Homework Help: Circular Motion

  1. Dec 16, 2013 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    Why the centripetal acceleration is negative in i direction and positive in j direction?

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  3. Dec 16, 2013 #2


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    From B, which way does the vector -i cos 35 + j sin 35 point?
    What direction would you expect the centripetal acceleration to be in?
  4. Dec 16, 2013 #3
    I recommend graphing the vector on your diagram, then graphing the vector alone. Plotting vectors always helps! Good luck.
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