# Conservation of Angular Momentum Help

## Homework Statement

Below is the question:

I only have an issue with the last step of the problem. Why wouldn't you factor in the translational AND rotational energy of the ball and then solve for maximum height?

jbriggs444
Homework Helper
The translational kinetic energy of the ball is the rotational kinetic energy of a system consisting of the ball alone when using a reference axis such that the ball's radial velocity is zero.

Speedking96
Stephen Tashi