597_Dynamics 11ed Manual

597_Dynamics 11ed Manual - k . If the bar is released from...

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Engineering Mechanics - Dynamics Chapter 18 Given: W 1 10 lb = W 2 20 lb = W 3 4lb = r AB 2f t = r BC 4f t = v C 3 ft s = g 32.2 ft s 2 = Solution: ω BC 0 rad = ω AB v C r AB = T 1 2 W 1 g r AB 2 3 ω AB 2 1 2 W 2 g v C 2 + 1 2 W 3 g v C 2 + = T 3.82 lb ft = *Problem 18-8 The bar of weight W is pinned at its center O and connected to a torsional spring. The spring has a stiffness k , so that the torque developed is
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Unformatted text preview: k . If the bar is released from rest when it is vertical at = 90 , determine its angular velocity at the instant = 0 . Use the prinicple of work and energy. Given: W 10 lb = k 5 lb ft rad = a 1 ft = g 32.2 ft s 2 = Solution: 90 deg = f 0 deg = 595...
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