A50.0-kg student stands on a 150-kg wooden plank. both start at rest on a frozen pond (assume the interface between pond and plank is frictionless). the student then walks with a constant velocity of 1.10 im/s relative to the plank. (a) what is the velocity of the plank relative to the frozen pond?

0.275 m/s in the opposite direction

Explanation:

m = Mass of student = 50 kg

M = Mass of plank = 150 kg

= Velocity of the student with respect to the plank = 1.1i m/s

As the linear momentum is conserved in the system

The plank will move at 0.275 m/s in the opposite direction

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c) both a and b.