In a Certain Cyclotron,a Proton of Mass 1

Multiple Choice

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