A friend is running clockwise at a constant speed on a circular track. At the instant your friend is running due east, your friend is due west of you. What is the direction of your friend’s angular momentum around you at that instant? Choose from the possible directions presented in problem C7T.3, remembering that this is a top view, with A corresponding to north, C to east, and so on. 
A. A
B. B
C. C
D. D
E. Upward
F. Downward
T. (The vector is zero)
T. (The vector is zero)
Physics & Space Science
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