Two figure skaters, one weighing 625N and the other 775N , push off against each

Question

Two figure skaters, one weighing 625N and the other 775N , push off against each other on very smooth ice.

Part A
If the heavier skater travels at 1.60m/s , how fast will the lighter one travel?
v = _________m/s
Part B
How much kinetic energy is "created" during the skaters' maneuver?
K = _________J

Part C
Where does this energy come from?
________________________________________________________________________________________________________________________________________________________________________________

Explanation / Answer

momentum conservation initial momentum = final momentum 0 = m1 v1 + m2 v2 0 = 625 * v1 + 775 * 1.6 v1 = -1.98 m/s (in opposite direction of v2) K=1/2 mv^2 and this energy is getting conserved

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