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The angular velocity of a rotating turntable is given in rad/s by ω(t) = 4.5 + 0.64t - 2.7t2. What is its average angular acceleration between t = 1.0 s and t = 3.0 s?


A) 0.64 rad/s2
B) −5.4 rad/s2
C) −7.7 rad/s2
D) −10 rad/s2
E) −27 rad/s2

F) A) and E)
G) All of the above

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A wheel starts from rest and has an angular acceleration that is given by α\alpha (t) = (6.0 rad/s4) t2. The time it takes to make 10 rev is:


A) 1.3 s
B) 2.1 s
C) 2.8 s
D) 3.3 s
E) 4.0 s

F) C) and D)
G) D) and E)

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