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If a bullet causes a spring to compress 4x further than first bullet..

Discussion in 'MCAT Study Question Q&A' started by csx, Sep 27, 2014.

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  1. csx

    csx 2+ Year Member

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    May 8, 2013
    how much would work increase?

    I figured OK...F=kx....so if x increases by a factor of 4 then the F in FxD= work should increase by 4.

    The answer key however says to use (1/2)kx^2 formula however ....but i thought that was equal to potential energy...not force. Anywho...it says the work increases by a factor of 16.

    whats going on here???
     
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  3. Cawolf

    Cawolf 2+ Year Member

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    Feb 26, 2013
    Work and energy are what you want to look at, not force, because by compressing the spring you are increasing it's potential energy.

    Look up the work-energy theorem if that does not sound familiar.
     

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