posted by Bryan .
A circular disk of radius 30 cm is rotating with an angular velocity of 2 radians / s. What is the tangential velocity of a point on the rim of the disk? What is its centripetal acceleration?
The tangential velocity is R*w = 60 cm/s.
The centripetal acceleration is R*w^2
= 120 cm/s^2
They may want you to convert the answers to m/s and m/s^2