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Homework Statement
http://hypertextbook.com/physics/mechanics/momentum-energy/problems.shtml
It's numerical #1, filling out the table, the part I am stuck on is recoil velocity. I have figured out the bullet momentum and bullet energy, however.
Homework Equations
(m1+m2)v=m1v1'+m2v2'
The Attempt at a Solution
The part that I don't understand is what is m2? M1 would be the mass of the bullet, but is the mass of the gun suppose to be m2?
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