Simple rotational motion point problem

[kirby27]

Two points are on a disk that rotates about an axis perpendicular to the plane of the disk at its center. Point B is 2.00 times as far from the axis as point A.

If the linear speed of point is V, then the linear speed of point A is

I know the speed of A must be less and i think its V/4. Is this right?

 

[HallsofIvy]

Yes, it is slower, no, it not V/4.

Suppose the distance from the center of the disk to point A is R so the distance from the center to point B is 2R. How far does each travel in one rotation? Remember that the both complete one rotation in the same time.

 

[kirby27]

ok. i think its V/2?