- #1
psingh
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Homework Statement
A 9.0 kg artillery shell is moving to the right at 100 m/s when suddenly it explodes into two fragments, one twice as heavy as the other. Measurements reveal that 900 J of energy are released in the explosion and that the heavier fragment was in front of the lighter fragment. Find the velocity of each fragment relative to the ground.
Homework Equations
I already have the solution 80 m/s for the heavier and 110 m/s for the lighter but i just want to understand why because i got it wrong on my quiz.
The Attempt at a Solution
i used the elastic collision galilean transforms, but came up with the wrong number.
9kg=x+2x so the heaver is 6kg and the lighter is 3 kg
then i plugged into
mu1'final=(m1-m2)/(m1+m2)*mu1'inital
and
mu2'final=2m/(m1+m2)*mu1'inital
but these were incorrect using 100 m/s as mu1'initial
any help?