Answer to Question 5
(a) Flywheel is a hollow cylinder:
I = Mr2 = 160 kg x (0.34 m)2 = 18.5 kg m2
(b) Find the angular velocity first:
w = 2 x p x (44000 rpm ÷ 60) = 4608 rad/s
Ek = 1/2 x 18.5 kg m2 x (4608 rad/s)2 = 1.96 x 108 J
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Answer to Question 5
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