The angular velocity of a rotating turntable is given in rad/s by ω(t) = 4.5 + 0.64t - 2.7t2.What is its angular acceleration at t = 2.0 s?
A) −10 rad/s2
B) -5.0 rad/s2
C) −5.4 rad/s2
D) 2.4 rad/s2
E) 3.1 rad/s2
Correct Answer:
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