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Homework Help: Basic Newton's Second Law Problem

  1. Oct 9, 2007 #1
    1. The problem statement, all variables and given/known data
    A 3.00kg object is moving in a plane, with its x and y coordinates given by x=5(t^2)-1 and y = 3(t^3) + 2, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t=2.00s

    2. Relevant equations

    F = ma

    3. The attempt at a solution

    Can I take the second derivative of both those function to get the x and y coordinates of acceleration, plugging in t and then solving for the vector?
  2. jcsd
  3. Oct 9, 2007 #2


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    Homework Helper

    yup. that gives acceleration. Then force is just [tex]m\vec{a}[/tex]
  4. Oct 9, 2007 #3
    Thank you <3
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