Asked by Fullmetal

An ice skater of mass (on frictionless ice) fires a bullet of mass 10 grams that leaves the barrel at 500 m/s (in the x-direction relative to the ground)

A) what is the recoil velocity of the skater relative to the ground?

B) how much work is done in the bullet by the exploding gunpowder?

Answers

Answered by Chanz
A) this is conservation of momentum, which is zero in both cases. Unfortunately you neglected to give the skater's mass.
mv (skater) = mv (bullet)
watch units.
B) W = KE of bullet = 1/2(.001)500^2
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