623_Dynamics 11ed Manual

623_Dynamics 11ed Manual - rad s = Problem 18-46 The...

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Engineering Mechanics - Dynamics Chapter 18 Problem 18-45 The overhead door BC is pushed slightly from its open position and then rotates downward about the pin at A . Determine its angular velocity just before its end B strikes the floor. Assume the door is a thin plate having a mass M and length l . Neglect the mass of the supporting frame AB and AC . Given: M 180 kg = l 6m = h 5m = Solution: dh 2 l 2 2 = Guess ω 1 rad s = Given Mgd 1 2 Ml 2 12 Md 2 + ω = ω ω = ω rad
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Unformatted text preview: rad s = Problem 18-46 The cylinder of weight W 1 is attached to the slender rod of weight W 2 which is pinned at point A . At the instant = the rod has an angular velocity as shown. Determine the angle f to which the rod swings before it momentarily stops. Given: W 1 80 lb = a 1 ft = W 2 10 lb = b 2 ft = 1 rad s = l 5 ft = 30 deg = g 32.2 ft s 2 = 621...
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