1. A 45.0-kg girl is standing on a 150-kg plank. Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a

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1. A 45.0-kg girl is standing on a 150-kg plank. Both are originally at rest on a frozen lake
that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a
Transcribed Image Text:1. A 45.0-kg girl is standing on a 150-kg plank. Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a
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