Planar Kinematics - Relative Motion

[aolse9]

Homework Statement

http://www.hdimage.org/images/n5gdv4yrqp0wkl11ioae.jpg

Homework Equations

a_A = a_B + a_A/B

The Attempt at a Solution

I have made a few attempts at this one, and I have gotten absolutely no where. All I have figured out is that the edge of the smaller circle will be the point of rotation, not the center of the object O. Any advice to steer me in the right direction will be greatly appreciated.

Cheers

 

[aolse9]

Any ideas?