Ring C has an inside radius of 55 mm and an outside radius of 60 mm and is positioned between two wheels A and B, each of 24-mm outside radius. Knowing that wheel A rotates with a constant angular velocity of 300 rpm and that no slipping occurs, determine 

(a) The angular velocity of the ring C and of wheel B, 

(b) The acceleration of the Points on A and B that are in contact with C.

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24 mm 5 mm