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Chapter 4, Problem 4/090 The 90-kg ventilation door OD with mass center at G is held in the open position shown by means of a

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FBD for OD Bar 05 K-Q6 Win 10.5 10. 409 LOCM W. Tqarang length of BC by using cosine rule B?- 0570.6--2x0,5 X0.6 COS 70° BC =point o moment about EMo =0 fgcX0.5 cos Co-2ó) - 9.81890(1ro-Singo ) = Fec = 765.49 m Draw FBD for AB Bar Toam EMA = 0 Ma-FBc

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