A wheel initially has an angular velocity of 18 rad/s.It has a constant angular acceleration of 2.0 rad/s2 and is slowing at first.What time elapses before its angular velocity is18 rad/s in the direction opposite to its initial angular velocity?
A) 3.0 s
B) 6.0 s
C) 9.0 s
D) 18 s
E) 36 s
Correct Answer:
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