Rotating tube with particle inside

[Mugged]

Ok so I have this tube of length 2R that rotates in the horizontal xy plane with constant angular velocity \omega about the z axis. And there is this particle of mass m that is released a distance R from the origin. Assuming the tube is frictionless I need to find the direction of the velocity of the particle just as it leaves the tube?

Picture:
http://img696.imageshack.us/img696/4020/tubev.png

Any help is appreciated!

[Graingrdanger]

I am telling Sri about this in class tomorrow


But the answer is v0/r