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Homework Help: Non-inertial frame of reference

  1. Mar 17, 2016 #1
    1. The problem statement, all variables and given/known data
    You use a string to suspend a cork ball with a mass of 22.0g from the ceiling of a moving speedboat. The ball and string hang at 32.5 degrees from the vertical. Calculate the acceleration of the speedboat.

    2. Relevant equations

    3. The attempt at a solution
    I was able to calculate using inertial frame of reference and I got 6.2m/s^2, which is the correct answer. But my teacher wants me to use non-inertial frame of reference to answers this question and I have no idea how.
    My teacher said that the acceleration of the speedboat is equal to the fictitious force, but I found the fictitious force and it did not equal to 6.2
  2. jcsd
  3. Mar 17, 2016 #2

    Doc Al

    User Avatar

    Staff: Mentor

    The fictitious force equals ma, not a. (An acceleration would not even have the correct units.)
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