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Thread: initial velocity

  1. #1 initial velocity 
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    I'm currently working on a science project, and I need to know the initial velocity of a track runner. I know the formula in order to figure this out, but unfortunly you need the acceleration, which is what I'm really trying to figure out. :?

    So if anyone knows how to find or figure out(without using acceleration) the initial velocity of a runner, it's greatly appreciated!


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  3. #2 Re: initial velocity 
    Forum Ph.D. GhostofMaxwell's Avatar
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    Quote Originally Posted by kippie
    I'm currently working on a science project, and I need to know the initial velocity of a track runner. I know the formula in order to figure this out, but unfortunly you need the acceleration, which is what I'm really trying to figure out. :?

    So if anyone knows how to find or figure out(without using acceleration) the initial velocity of a runner, it's greatly appreciated!
    All you need to do is get the initial speed at the same point as the initial distance . Then:

    a = v^2 - u^2 /2s


    where
    u is the initial speed
    v is the delta speed + u
    s is the delta distance


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  4. #3 Re: initial velocity 
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    Thank you so much for your help! I really do appreciate it.
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  5. #4 Re: initial velocity 
    Forum Ph.D. GhostofMaxwell's Avatar
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    Quote Originally Posted by kippie
    Quote Originally Posted by GhostofMaxwell
    Quote Originally Posted by kippie
    I'm currently working on a science project, and I need to know the initial velocity of a track runner. I know the formula in order to figure this out, but unfortunly you need the acceleration, which is what I'm really trying to figure out. :?

    So if anyone knows how to find or figure out(without using acceleration) the initial velocity of a runner, it's greatly appreciated!
    All you need to do is get the initial speed at the same point as the initial distance . Then:

    a = v^2 - u^2 /2s


    where
    u is the initial speed
    v is the delta speed
    s is the delta distance
    Thank you so much for your help! I really do appreciate it.
    You're welcome.

    Acceleration is just how much somethings speed changes over a given distance. So just take the first speed at the beginning of that distance and the second speed at the end of that distance and its a sinch.
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  6. #5  
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    Most track races use a standing start so the initial velocity would be zero, wouldn't it?
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  7. #6  
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    I was thinking that for alittle while but not sure. Better safe then sorry :) Thanks for taking the time to help :D
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