A Solid Uniform Disk of Diameter 3

Multiple Choice

A solid uniform disk of diameter 3.20 m and mass 42 kg rolls without slipping to the bottom of a hill, starting from rest. If the angular speed of the disk is 4.27 rad/s at the bottom, how high did it start on the hill?

A) 3.14 m
B) 4.28 m
C) 2.68 m
D) 3.57 m