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Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: TOUGH ONE A bullet loses 1/20 of its velocity in passing thro
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ramyani chakrabarty (3105)

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Take a short-cut :

 a bullet is fired with certain vel. into a block of wood . it loses 1/nth of its initial speed after travelling a dist. x in the block . determine the total dist. penetrated by it before coming to rest....
ans) 
                   x'   =   {N2/ 2n - 1} x
 
                               where N is the amt of speed it loses (eg. if 1/10 th loses then N = 10)
 
http://www.goiit.com/posts/list/mechanics-formulas-6412.htm
NIT silchar electrical engineering
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