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Midterm 2 Solutions

# Midterm 2 Solutions - ME 343 F09 Midterm 2 16 November 2009...

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Unformatted text preview: ME 343 F09 Midterm 2 16 November 2009 Exam is closed book and closed notes, you are allowed a 1 page (2 sided) 8.5” X ll” note sheet. Remember that all vector answers need BOTH magnitude and directionl Good luck Problem 1: (15 Points) Design a slider crank mechanism Wilh the following properties: Q (Time Raiio) “m" 1 “:3? meme, @lgggﬁ PM}; \M 5 J; STICKS (AR4)mex : 2 in 53> Ely-Z”, 3’ i AM Time per cycle W 1.53 51:), x 1‘55 J, g Q L0? {new F“ m 3 4g} {gym A complete design will Speéﬁjall!%eqﬁii*ed lebgtbsfandéhte“ s‘if‘lve‘eﬂ at which the crank is to be driven. -- . ‘s l éxl'blkj/ \‘WE \> \hw’ﬁ Ruling» . WQQM, Problem 2: (15 Points) Link 2, shown in the ﬁgure below, is rotating counterclockwise, at a speed of 309mm, determine the velocity of points A, and B. Given [in 60°, and 3/3 50°. RVs, =‘= “N51 " “min—miighzrf: Problem 3: (20 Points) F 01“ the carton feeding mechanism shown below, in ﬁgure 3, the 3m {ix-”M crank rotates clockwise with a cogstant anguiaj velocity of 350mm, ~ 3“; were; A6 . . AM “We . a» a a ”QM determme the lmear acceieratlon of the ram at the instant shown in the ﬁgure. \jgmﬁtw Ceéﬁiﬁma e: W\ [L] a», (if w J" \ a \ \$5“ fwﬁm “f i? (r) Qgﬂﬁlgjeﬁgxﬁméj (WE: ﬁenncctiz)<*ré)d : " ' in; “':-'*'<‘::s=;:. {as . a i?” ; \$3?” r M“ if ‘ -n WW“ if ‘ a “3“ K93}? Igﬁﬁﬁﬁﬂgb U63 “(5% mg»? (if; \@ {ﬁg :.__ - M . . -- “a 8% “f. ““3“ M“ Fléure‘fi: Package Feeding Mechanism 77777777777777777 M 4 5m N7 f 566? £5? §%ﬁ “vi:- 1 ‘ w .E A “2” .‘“ W f; 1L a ﬂea... W ‘ m ' “"2 J “W” " " W ‘ ‘ {1,6 M w {We '1?" g5?) :; @gjlm :— agik‘shgﬁmfggéf Problem 4 : (25 points) For the {:01le essor linkage shown below calculate the linear velocity and linear acceleration of the piston at the instant shown, given that the 2m crank ES rotating clockwise at 125 RPM and accelerating at 500 rad/SE. WW.» w— “WWW mum-W” WMMWMWWMW Ella} Fl §% 2,. ﬁll 3E; l men gwﬁ ll} l all lawn (lag?) 34% {@F} a} ﬁ> {Elf/l?) -» C, ‘ Mi}? lﬁgﬁ?’ {g‘zgg pl illlll? Ella ’gw Mlle llmlz {Emmy llﬁll ll; Cl“) ﬁg“ 4%" 3%le 34\$ 63%; .. jg Aw.“ _w__.......« m-W-‘d‘ww-w-w- mH-W ..._.._ _____._,,,_u__ . .., l l \Qc Wlml“ﬂ Problem 5: (25 points) For the power hacksaw Shown in the ﬁgure below the l.75in crank is rotating at 80 RPM and accelerating at 50 rad/32, for the instant shown calculate the linear velocity and linear acceleration of the hacksaw blade. ...
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