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A "block" of mass"M" moving with velocity "v 0 " on a smooth horizontal surface, collides with plank of mass "M" kept on the smooth horizontal surface at rest initially. a solid cylinder of same mass "M" is also kept initially at rest on the plank. the cofficent of friction between the plank and cylinder and plank is "x" , and assume the length of plank to be very large, and collision to be perfectly elastic. find:- 1. the velocity of Center of Mass of cylinder when it starts pure rolling on the plank. 2. the velocity of centre of mass of plank when cylinder starts pure rolling.


 A "block" of mass"M" moving with velocity "v0" on a smooth horizontal surface, collides with  plank of mass "M" kept on the smooth horizontal surface at rest initially. a solid cylinder of same mass "M" is also kept initially at rest on the plank. the cofficent of friction between the plank and cylinder and plank is "x" , and assume the length of plank to be very large, and collision to be perfectly elastic. find:-

1. the velocity of Center of Mass of cylinder when it starts pure rolling on the plank.

2. the velocity of centre of mass of plank when cylinder starts pure rolling.



Grade:upto college level

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