posted by Anonymous on .
A 48.2 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 2.00 m/s to the right relative to the plank.
(a) What is her velocity relative to the surface of the ice?