Chapter 11 - Rolling, Torque, and Angular Momentum - Problems - Page 322: 31a

The angular momentum about $P$ is $~~0$

Note that at maximum height, the velocity is zero. We can find the angular momentum about $P$: $L = r_{\perp}~mv$ $L = (2.0~m)(0.400~kg)(0)$ $L = 0$ The angular momentum about $P$ is $~~0$