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Math Help - Urgent!! Parametric Equations!!

  1. #1
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    Urgent!! Parametric Equations!!

    heyy.. i need to graph the following on my TI-83 plus in parametric mode.
    y=2.5t^3-15t^2 and x= -1. i pretty much figured that one out, but i need to get the velocity, displacement, and acceleration equations and graph them. Thanks for ur help!! also, if its not too much trouble, a little description of wha it looks like would be great so i know i have the right graph
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by samantha_malone View Post
    heyy.. i need to graph the following on my TI-83 plus in parametric mode.
    y=2.5t^3-15t^2 and x= -1. i pretty much figured that one out, but i need to get the velocity, displacement, and acceleration equations and graph them. Thanks for ur help!! also, if its not too much trouble, a little description of wha it looks like would be great so i know i have the right graph
    Are you sure this is right? If x is a constant, then the graph simply lies on a vertical line. (It has a max value, but stretches to negative infinity, or whatever y level you are using for the "ground.")

    -Dan
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  3. #3
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    yes i am sure it is right. the equation i gave u is supposed to simulate an elevator going up and down. i just need to find the velocity, acceleration and displacement
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  4. #4
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    Quote Originally Posted by samantha_malone View Post
    yes i am sure it is right. the equation i gave u is supposed to simulate an elevator going up and down. i just need to find the velocity, acceleration and displacement
    Velocity in the y direction is \frac{dy}{dt}

    and acceleration in the y direction is \frac{d^2y}{dt^2}

    The elevator will have not velocity or acceleration in the x directions.

    Remember that \frac{d}{dt}t^n=(n)t^{n-1}

    Good luck.
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  5. #5
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    am i going to be able to put this into my calculator??
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