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Speed and location

  1. Apr 15, 2017 #1
    1. The problem statement, all variables and given/known data
    A body moves in a straight line along the x-axis. Its expansion as a function of time is:


    Given that at the moment t = 0 its speed was v0 in the positive direction of the x axis, and its position was at x0.

    1. the body velocity in meters per second has a given moment t0?

    2. What is a body position on the x-axis in meters include a given moment (t=t0)?

    2. Relevant equations
    k = 24 m sec-3
    b = 12 m sec-2
    v0 = 3 m sec-1
    x0 = 2 m
    t0 = 5 sec

    3. The attempt at a solution
    Made with integral limit t-t ,Got 240 speed and location 1200 , And this error
  2. jcsd
  3. Apr 15, 2017 #2


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    Can you show the details of how you did the integrals?
  4. Apr 15, 2017 #3


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    The "relevant equations" are supposed to be general physics equations that you feel may apply to the problem, not facts specific to the question.
    An example here might be ##\Delta v=\int _{t_i}^{t_f}\ddot x.dt##. In that equation, what does Δv represent?
  5. Apr 15, 2017 #4
  6. Apr 15, 2017 #5


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    Not exact enough. What is the Δ there for?
    Last edited: Apr 16, 2017
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