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A 44.4−kg girl is standing on a 141-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.58 im/s relative to the plank. (a) What is the velocity of the plank relative to the ice surface? î m/s (b) What is the girl's velocity relative to the ice surface? i^ m/s

A 44.4−kg girl is standing on a 141-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.58 im/s relative to the plank. (a) What is the velocity of the plank relative to the ice surface? î m/s (b) What is the girl's velocity relative to the ice surface? i^ m/s

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A 44.4 − k g girl is standing on a 141-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.58 i m / s relative to the plank. (a) What is the velocity of the plank relative to the ice surface? î m / s (b) What is the girl's velocity relative to the ice surface? i ^ m / s

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