Constant Angular Acceleration: An old 78 rpm record rotates through an angle of 320° as it slows down uniformly from 78.0 rpm to 22.8 rpm. What is the magnitude of the angular acceleration of the record?
A. 2.34 rad/s2
B. 5.46 rad/s2
C. 6.50 rad/s2
D. 8.35 rad/s2
E. 10.9 rad/s2
Answer: B
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