3. A 75 g, 30 cm long rod hangs vertically on a friction less, horizontal axel passing through the center. A 10 g ball of clay travelling horizontally at 2.5 m/s hits and stick to the very bottom tip of the rod. To what maximum angle, measured from vertical, does the rod rotates when the ball of clay is attached to the rod? just how to approach for the problem

Question

3.	A 75 g, 30 cm long rod hangs vertically on a friction less, horizontal axel passing through the center. A 10 g ball of clay travelling horizontally at 2.5 m/s hits and stick to the very bottom tip of the rod. To what maximum angle, measured from vertical, does the rod rotates when the ball of clay is attached to the rod? just how to approach for the problem

anonymous · Answer

This came up the other day, and I learned about it! you need to use conservation of angular momentum, and the easiest way to learn is this video series: http://www.youtube.com/watch?v=K-KftkOGuHE (1st part)