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A rotor at 4 rad/s gains speed uniformly at 2 rad/s^2 over 5 rad. Its final angular speed is
A6 rad/s
B14 rad/s
C36 rad/s
D9 rad/s
Answer & Solution
Correct answer: A. 6 rad/s
ω^2 = ω0^2 + 2αθ = 16 + 20 = 36, so ω = 6 rad/s.
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