Question

A plank of mass M carrying a man (of mass m) is
moving horizontally with velocity u on frictionless
horizontal surface. If the man starts walking
towards right with velocity vo w.r.t. the plank then,
velocity of centre of mass (of plank + man) is
​

Answer 1

Answer:

velocity of centre of mass is zero....a tricky question..... in which normal students calculatr by using m1r1=m2r2

...but if u read the question properly u will get the answer ... ... no external force acting on body momentum conserved .... u will get here a shift in com not velocity in com...

hope it helps u

and hope am correct..