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A flywheel with I = 2 kg m^2 spins at 4 rad/s. What is its rotational kinetic energy?
A4 J
B16 J
C32 J
D8 J
Answer & Solution
Correct answer: B. 16 J
K = Iω^2/2 = 2 x 16 / 2 = 16 J.
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