using conservation of angular momentum
I w1 = ( I +m r^2) w2
0.5 * 150* 1.8^2* 0.580= ( 0.5* 150* 1.8^2 + 19* 1.8^2)* w2
w2 = 0.463 rev/s = 2.907 rad/s
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Problem 9: A playground merry-go-round with a mass of 150 kg and a radius of 1.8...
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