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Math Help - Acceleration help

  1. #1
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    Angry Acceleration help

    Assume that a fully loaded plane starting from rest has a constant acceleration while moving down a runway. The plane requires 0.7 mile of runway and a speed of 160 miles per hour in order to lift off. what is the plane's acceleration?
    ---I don't get this problem...plz...help me...thanks
    Last edited by mr fantastic; January 14th 2010 at 02:40 AM. Reason: Edited post title
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  2. #2
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    use this formula

    v_{t}^{2}-v_{0}^{2}=2as, where v_{t} and s are given, and v_{0}=0. Then we have the a.
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  3. #3
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    Thanks Fresnel...but.. how can i know if this formula : V^2 - V0^2 = 2as in physic or calculus... Can you have another way to solve it involve to acceleration in calculus.
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  4. #4
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    Quote Originally Posted by linean View Post
    Thanks Fresnel...but.. how can i know if this formula : V^2 - V0^2 = 2as in physic or calculus... Can you have another way to solve it involve to acceleration in calculus.
    It's one of Newton's Laws of motion albeit more often written as v^2 = v_0^2+2as

    By definition

    a = \frac{\Delta v}{\Delta t}

    but why you'd use calculus is beyond me since acceleration is constant so Newton's Laws of Motion can be applied
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  5. #5
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    Using Integrals for Acceleration Problem

    Hi there! I realize this post is pretty late, you probably already have the solution. But I thought I'd post it anyway, in case someone else needed it. I ran into this problem in my text today and it drove me crazy. Everyone wanted to use kinematics or definite integrals, neither of which were appropriate for the section. I hope it's acceptable that I uploaded the image, I hate trying to interpret ^ and / everywhere.

    Hope this helps.

    Sarah


    Attached Thumbnails Attached Thumbnails Acceleration help-screenhunter_03-feb.-03-18.59.jpg  
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