A Pencil, 15

Multiple Choice

A pencil, 15.7 cm long, is released from a vertical position with the eraser end resting on a table. The eraser does not slip. Treat the pencil like a uniform rod. What is the angular speed of the pencil when it makes a 30.0° angle with the vertical?

A) 3.35 rad/s
B) 3.56 rad/s
C) 7.23 rad/s
D) 9.91 rad/s
E) 6.32 rad/s