How Does Acceleration Impact the Angular Rotation of a Beam?

[Ry122]

if b is the fulcrum then Va = Vb + Wab*rb/a
But this taking into account only the velocity mentioned in the question.
I'm not sure what effect the acceleration will have on the velocity of point A.
What equation do I need to use to take the acceleration into account as well?

[PLAIN]http://img197.imageshack.us/img197/112/beamdy.jpg

 

[Quinzio]

It says "at this instant", so...

 

[Ry122]

Are you saying that it has no effect?

 

[Marioqwe]

Isn't there a relationship between linear velocity and angular velocity?