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El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0here you have variable force: F=kx ... it depends on position.

El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350261159818:dw

El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350261277772:dw

El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350261506593:dw

El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0this is strange ... the bullet emerges with almost same veclocity http://www.wolframalpha.com/input/?i=sqrt%282%281%2F2*0.005*400^2++900*0.05^2%2F2+%29%2F0.005%29

El_Psy_Congroo!!
 2 years ago
Best ResponseYou've already chosen the best response.0for this .. just remember PE of spring is \[ {1 \over 2}kx^2\]
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