1. The problem statement, all variables and given/known data A weather vane sits quietly on the roof of a barn on a calm winter's day. It has a length of x, is pole-shaped with mass M, and rotates frictionlessly about its center. But just now it is still. Suddenly Justin throws a snowball of mass m at speed v that hits it a distance r from one end. How fast is the vane spinning (in rpm) after the impact? 2. Relevant equations 3. The attempt at a solution I am not really sure how to approach and set up this problem. please help!