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Homework Help: Particle moving along path, change of angle of inclination

  1. Jul 16, 2017 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations
    Equation given in question.

    3. The attempt at a solution
    The only thing I could think of was to try changing the y=3x^3 into polar coordinates but I didn't know where to go from there... Could I get some direction to how I should go about this, I'm sort of stumped as to how I should start this.
  2. jcsd
  3. Jul 17, 2017 #2

    Ray Vickson

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    Science Advisor
    Homework Helper

    Your "question" is unreadable. You should take the trouble to actually type it out here; many helpers would not look at posted images, even if they were readable.
  4. Jul 21, 2017 #3


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    You are given a hint to use curvature. Have you been taught any equations relating to that? See "curvature of a graph" at https://en.m.wikipedia.org/wiki/Curvature.
    Or, from first principles, you know ##\theta=\arctan (dy/dx)##. You could find how fast that changes as x changes and divide by how fast distance along the curve changes as x changes.
  5. Jul 21, 2017 #4


    Staff: Mentor

    I agree.
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