A disk is rolling without slipping. Find the velocity of the point on the rim of the disk which is in the same level of the centre of the disk??? if the velocity of the centre of mass is Vcm... Assuming the disk to be uniform

See the question is quite simple.

There are 2 points on the rim in the same level as the com of the disk. Now these points have two velocities - rotational and translation at right angles to each other and since  the rolling is pure , we know that v=rw.

Therefore the net velocities of these two points is the resultant of v and v and that is v root2.

Approved