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![[Post New]](/templates/default/images/icon_minipost_new.gif) 5 Apr 2008 14:05:09 IST
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50)
the natural length is 0.4 and let the xtended length be 0.4+x
mg=kxcos@
cos@=mg/kx
which is also equa to 0.4/0.4+x
solving which we get x as 0.1
mgh=1/2mv^2+1/2mv^2+kx^2
since velocity of both the blocks will be the same
solving it we wll get v as 1.5
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