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Class09_HW2 - LIU‘O‘ A Lin-diameter cylindrical mamas1...

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Unformatted text preview: LIU‘O‘ A Lin-diameter cylindrical mamas1 M. is wnnectsd to a 2-m-wide rcctangular gate as shown in Fig. PZJOIHI‘J'I: gate is :0 open when the wamr level. In. drops below 2.5 m. Determine the required value for M. Neglect fricfian at I11: gate hinge and the pulley. FIGURE Pl. IOJ-f- %=xfiA T _ 4: 1 _ in?) 4H } T : y’al- FR M3 where a” Imam are Ii: rm. ”3 i ‘1' 3 For etbuih‘brfum) a Hx—k T F]; ZMJO 50 Thai: 3 '1‘ T = (g) F»- : Xq—E- and _' 3.13.3 — ‘fif F'ér The tgfifidnal mass ffivchI'cd =0 anal T: Mg fl F5: M3". Eli-mu: Thus, V‘V- X’gB 1 M= “—5.22: = Ti + W130) (ii-r) 3 and {or ‘E.=1'3'm 3 (:9- ) —- M 1 ‘ -- m h = (1901102235) :3: + {’ 3 (2'5“ I'D if 9.91%: 2‘1‘93 ...
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