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wchvball13
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Homework Statement
A projectile (mass = 0.24 kg) is fired at and embeds itself in a target (mass = 3.00 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile in it) carry off after being struck?
Homework Equations
½m1vf1² + ½m2vf2² = ½m1vo1² + ½m2vo2²
The Attempt at a Solution
I don't even know where to start if you don't have one of the velocities. Just point me in the right direction and hopefully I can take it from there. There aren't any examples in the book, or any explanations of how to do this.
I know that since the target is at rest to start off with the equation will be
½m1vf1² + ½m2vf2² = ½m1vo1² + 0
but that's all I got...