Angular Velocity and Acceleration

[nathan8]

Homework Statement

Link AB has angular velocity and angular acceleration as shown. Determine the velocity and
acceleration of point C and the angular acceleration of link BC at this instant. Express them as
Cartesian vectors. https://www.physicsforums.com/attachments/41853

Homework Equations

vA = 0
aA = 0
w= -2k
(alpha) =2k

The Attempt at a Solution

I have found that the point b has a velocity of -j

Im not sure how to equate this to the angular velocity of BC or the angular acceleration of BC.

I have used tried applying the ac = (alpha) x rc/b - w²rc/b

but this isn't producing any solution

 

[Simon Bridge]

Invalid attachment.

 

[nathan8]