Angular Momentum: In a certain cyclotron, a proton of mass 1.67 × 10-27 kg moves in a circle of diameter 1.6 m with an angular speed of 2.0 × 106 rad/s. What is the angular momentum of the proton?
A. 1.3 × 10-21 kg ? m2/s
B. 1.8 × 10-21 kg ? m2/s
C. 2.1 × 10-21 kg ? m2/s
D. 3.2 × 10-21 kg ? m2/s
Answer: C
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