first of all I have a case that is screwed in another case ,I like to know a basic way to calculate the impact force in the screws ,the are 16 screws, I try using the basic impact force formula and the conservation of energy in the free fall,but Im having problems since I dont have the D wich apparently its the distance after the impact.The weigh of the box is 27 lbs and its throwed from 5 ft.(adsbygoogle = window.adsbygoogle || []).push({});

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# Free fall and impact force calculation

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