Physics, 19.10.2021 01:30 Eylul30

A 45.0-kg girl is standing on a 160-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 1.45 m/s to the right relative to the plank. (Let the direction the girl is moving in be positive. Indicate the direction with the sign of your answer.)

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A 45.0-kg girl is standing on a 160-kg plank. The plank, originally at rest, is free to slide on a f...