Dynamics (Kinematics) relative motion, HELP

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Homework Statement

The bar AB is rotating with an angular velocity w=10rad/s. Determine the velocity of the piston C at the instant θ = 45. Provide the vector solution and the solution with the instantaneous center of zero velocity

Homework Equations

Vb = Va + w x r(b/a)
Vc = Vb + w x r(b/c)
vb = w*r(b/ic)

The Attempt at a Solution

I found Vb (Vb = w*r_ab) Vb=2108.2 cm*rad/s. Vc = 2108.2cm*rad/s + w*224.6cm. IS the w I use for the equation the one given to me (10 rad/s) or is it another one?

 

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