2. A mother with a mass of 60 kg skates across an ice rink with negligible friction toward her child, with a mass 20 kg,
2. A mother with a mass of 60 kg skates across an ice rink with negligible friction toward her child, with a mass 20 kg, who is standing still on the ice. If the mother moves at 4 m/s before she reaches her child, what will be her new velocity after she picks up her child and holds onto him
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