When a fan is turned off,its angular speed decreases from 10 rad/s to 6.3 rad/s in 5.0 s.What is the magnitude of the average angular acceleration of the fan?
A) 0.86 rad/s2
B) 0.74 rad/s2
C) 0.37 rad/s2
D) 11 rad/s2
E) 1.2 rad/s2
Correct Answer:
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