The front and rear sprockets on a bicycle have radii of 9.00 and 5.10 cm, respectively. The angular speed of the front sprocket is 6.00 rad/s. Determine the following.

(a) The linear speed of the chain as it moves between the sprockets.

cm/s

(b) The centripetal acceleration of the chain as it passes around the rear sprocket.

cm/s2

i think the formula is something like: sqrt(r^2 * w^4 + r^2((w-w0)/t)^2)

however, there are two radius' ?

also, not sure how to compute the speed.