Estimate the velocity of plank relative to surface of ice

Reference no: EM13668485

A 45.0 kilogram girl is standing on a 159 kilogram 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 1.39 m/s relative to the plank.

(a) Find what is her velocity relative to the surface of ice?

m/s

(b) Find the velocity of the plank relative to the surface of ice?

m/s

Reference no: EM13668485

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