Physics problem about rolling, torque, and angular momentum?

Posted on 2014-12-22 12:53:00 in Physics by LIYAN

A 2.0-kg block travels around a 0.40-m radius circle with an angular speed of 16 rad/s. The circle is parallel to the xy plane and is centered on the z axis, a distance of 0.60 m from the origin. The z component of the angular momentum around the origin is

A
9.2 kg?m^2/s

B
12 kg?m^2/s

C
7.7 kg?m^2/s

D
5.1 kg?m^2/s

E
17 kg?m^2/s

*** The correct answer was D: 5.1 kg*m^2 /s but I am not sure how to arrive at that answer ***

Can someone please explain how to do this problem/show work for this problem?

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