618_Dynamics 11ed Manual

618_Dynamics 11ed Manual - r . Solve using the conservation...

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Engineering Mechanics - Dynamics Chapter 18 Given: W r 15 lb = k 4 lb ft = W d 20 lb = L 3f t = θ 1 45 deg = r 1f t = Solution: Guess ω 1 rad s = Given 02 W r L 2 θ 1 () + 2 1 2 1 3 W r g L 2 ω 2 1 2 k 2 L 2 L θ 1 () () 2 + ω ω () ω 4.284 rad s = Problem 18-38 A yo-yo has weight W and radius of gyration k O . If it is released from rest, determine how far it ω . Neglect the mass of the string and assume that
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Unformatted text preview: r . Solve using the conservation of energy. Given: W 0.3 lb = k O 0.06 ft = 70 rad s = r 0.02 ft = g 32.2 ft s 2 = Solution: W s + 1 2 W g r ( ) 2 1 2 W g k O 2 2 + + = s r 2 k O 2 + 2 g 2 = s 0.304 ft = 616...
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