A thin, cylindrical rod = 23.6 cm long with a mass m = 1.20 kg has a ball of diameter d = 10.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The combination is free to pivot about the bottom end of the rod after being given a slight nudge.
B)find angular speed of rod and ball system
C)what is the linear speed of the center of mass of the ball
I found the rotational kinetic energy which came from potential energy of rod and ball. Please and thank you so much!

Question

A thin, cylindrical rod  = 23.6 cm long with a mass m = 1.20 kg has a ball of diameter d = 10.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The combination is free to pivot about the bottom end of the rod after being given a slight nudge.
B)find angular speed of rod and ball system
C)what is the linear speed of the center of mass of the ball
I found the rotational kinetic energy which came from potential energy of rod and ball. Please and thank you so much!