751_Dynamics 11ed Manual

751_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 21 Given: M 40 kg = a 0.75 m = d 20 mm = b 1.25 m = ω 8 rad s = g 9.81 m s 2 = Solution: Check both up and down positions Guesses A up 1N = B up = Given A up B up + Mg M d 2 = A up aB up b + 0 = A up B up Find A up B up , () = A up B up 213.25 127.95 N = Guesses A down = B down = Given A down B down + Md 2 = A down down b + 0 = A down B down
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