As a 20-Kg Block Travels Around a 0

Multiple Choice

As a 2.0-kg block travels around a 0.50-m radius circle with an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a distance of 0.75 m from the origin. The z component of the angular momentum around the origin is:

A) 6.0 kg.m²/s
B) 9.0 kg . m²/s
C) 11 kg . m²/s
D) 14 kg . m²/s
E) 20 kg . m²/s