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A hunter holds a 3kg rifle and fires a bullet of mass 5g with a muzzle velocity of 300m/s. What is the final kinetic energy of the bullet and the riffle?

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.005 (300) = - 3 v
v = -.5

Ke = (1/2)(.005)(300)^2 + (1/2)(3)(-.5)^2

224.625 J

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