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QUESTION
0 kg girl is standing on a 161 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface.
A 45.0 kg girl is standing on a 161 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.33 m/s relative to the plank.
