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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

    May 8, 2013
    Pre-Health (Field Undecided)
    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

    Feb 26, 2013
    Medical Student
    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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