Projectile Strike Homework: Angular Momentum

[TBBTs]

Homework Statement

http://i.imgur.com/vykpq.png

Homework Equations

The Attempt at a Solution

Feel like should use conservative of angular momentum but not sure how to write equations

 

[tiny-tim]

Feel like should use conservative of angular momentum …

That's right …

start by writing the angular momentum before the collision …

what is that?​