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Thread: IROC word problem

  1. #1
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    IROC word problem

    Hi,

    I hope someone can help! I'm trying to understand where I went wrong in my solution in order to get a negative number as opposed to a positive. The actual answer is -27, even though mine is 27. I attached the question, along with my steps in this post.

    - Olivia
    IROC word problem-17453549_1345109388878485_663906313_o.jpgIROC word problem-screen-shot-2017-03-22-8.37.04-pm.png
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  2. #2
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    Re: IROC word problem

    reverse the values in the numerator ...

    should be $\dfrac{h(3.01)-h(2.99)}{3.01-2.99}$
    Thanks from otownsend
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  3. #3
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    Re: IROC word problem

    I have no clue what your computations are supposed to be doing.

    Although you do not bother to define IROC, I figured it out.

    Question: In your mind what does IROC represent, distance from some defined place, time since some defined time, or something else?

    Does h(x) represent distance above the ground or below the ground?

    If x represents time, time since when, the beginning of the universe, three minutes ago, when the object was launched?

    What does positive velocity represent in terms of direction?

    What does negative velocity represent in terms of direction?

    When time is 29, what is the distance?

    When time is 31, what is the distance?

    So what in what direction is the object moving in the interval $29 < x < 31.?$
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