Practice_Exam_2 - 5I197’I‘fllongend4fiin diameter is...

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Unformatted text preview: 5I197’I‘heeolidooncretecylinder6fllongend4fiin diameter is supported in ohm—submerged position infi'eehwaterhyamblewhichpamuverafixed pulleyatA. ComputeflleteneionTintheoable. Thecylinderisweberproofedhyaplaeficooafing. (Consult TehleD/1,AppendixD.asneeded.) Problem SI I 97 5’198 Ablookofwoodinthofm'mofaweterproofedIG-in. wbeiafloetinginatankofsaltwnterwithaG-in. layerofoilfloetingonthewnter.Aaeumethalthe wbefloeteintheatfimdeshomandcelculatethe heighthoftheblockabovethemrfaeeoftheoil. Theepecificweighteofoiimaltwatermndwoodare 56, 64,8nd501blfi3, respectively. Problem 5] 'l 98 5”” A fresh-water channel 10 ft wide (normal to 5/200 A channel-marker buoy consists ofan 8-ft h plane ofthePfiPEI’) ishlocked at itsendbya tangularbMer, shown ineectionABD. Su ingstrutaBCerespeoedeveryZfialongthel width. Determine the compression C in each Neglecttheweights of the members. Problem 51199 steelcylinder 12in.ind’mmeterweighin3180 andsnchotedtothebottomwithacahleasah Ifh=2flnthightide,mlculetethetension1“ themble.Alsofindthevelueofhwhenthe goeaalackaethetidedmps.Thespecificweight seawateriafilblfia.mmethehuoyisweigh atitabeeesothatitremainavertical. Problem 5I200 ‘ , 4] I 37 A frame designed to test the compressive strength of concrete blocks is composed of the four pres- sure pads, the four compression links, and the three outer links arranged in a square as shown. Express the compressive force C acting on each side of the square concrete block in terms of the appiied forces P. P P Problem 4113? 41130 The nose-wheel assembly is raised by the applica- tion of a torque M to link BC through the shaft at B. If the arm and wheel A0 have a combined weight of 100 1b with center of gravity at G, find the value of M necessary to lift the wheel when D is directly under B, at which position angle 9 is 30“. Problem 41138 41139 If it is known that the center pin A supports one- half of the vertical loading shown, determine the force in member BF. 6 panels at 12m‘fl lug“ 12m skN BkN 101m —10kN SkN elm—L .“ _ Problem 4] I 39 4!!“ All two-force members of the loaded truss are of the same length. Member BCD is a rigid beam. Deter~ mine the forces in members BG and CG in terms of the load L. Problem 41140 41141 Determine the forces in members AB, BI, and CI of the simple truss. Note that all curved members are two-force members. 20 In Ah F a s c D E . L L L L 15 m~>J-15 m~>L—20 to +15 med-615 to Problem 4I'l4l PROBLEMS Introductory Problems SI 101 Determine the reactions at A and B for the been subjected to the uniform load distribution. Problem 5! 101 5] 'I 02 Calculate the support reactions at A and B for the loaded beam. 5I105 Determine the reactions at A and B for the beam subjected to a combination of distributed and point loads. Probiem 5] 105 5I106 Determine the reactions at the supports of the beam which is loaded as shown. 80111 Problem 5] I 02 SIIOS Find the reaction at A due to the uniform loading and the applied couple. Problem 51106 5] 107 Determine the reactions at the supports A and B for the beam loaded as shown. Problem 5] 1 03 SH 04 Calculate the supporting force R A and moment M A acting on the loaded cantilever beam at A. Problem 5] 'l 07 ill 14 The elements of a rear suspension for a front- wheel-drive car are shown in the figure. Determine the magnitude of the force at each joint if the nor— mal force F exerted on the tire has a magnitude of 3600 N. Problem 4]] 14 III 15 Calculate the x- and y-components of all forces act- ing on each member of the loaded frame. Dimensions in millimeters Problem 4I‘I 15 Ill 16 The truck shown is used to deliver food to aircrafi. The elevated unit weighs 2000 lb with center of gravity at G. Determine the required force in the hydraulic cylinder AB. Problem 4]] 16 4] 117 The designers of lamp mechanisms, such as .1. shown in the figure, usually rely on joint friction; aid in maintaining static equilibrium. For the .. .—.,' ent problem, assume that sufficient friction -_..' V at point C to prevent rotation there, but ignore .._'7 tion at all other joints. If the mass of the lamp .2" ture is 0.6 kg with mass center at G, determine ', spring force F5 necessary for equilibrium in - ‘ position shown. Problem 4]! 1 7 41118 A double-axle suspension for use on small tru . _ shown in the figure. The mass of the central . : Fis 40 kg, and the mass ofeach wheel and a m I; link is 35 kg with center ofmass 680 mm from 1" vertical centerline. For a load L = 12 kN tr. 3..” fed to the frame F, compute the total shear f-' .‘ supported by the pin at A. i+~500mm L ”1 750 mm Dual-lam A [1 'I B “106111 the special position shown for the log hoist, booms AF and EG are at right angles to one an- other and AF is perpendicular to AB. If the hoist is handling a log weighing 4800 lb, compute the forces supported by the pins at A and D in this one ’ position due to the weight of the log. Problem 44106 4! 'I 07 The knurling tool produces a knurled gripping sur- face on the rotating shalt A in the lathe. The force exerted on the shaft by the imprinting rollers B is produced by the adjusting screw C and the force F exerted by the lathe toolpost on the pivoted shank of the knurling tool. If screw C is under a tension of 1.2 kN for the configuration shown, determine the toolpost force F and the force P supported by the bearing of each knurling roller B. Problem 4] 'I 07 4I'IDB The device shown is used to drag loaded wooden pallets across warehouse floors. The wood board shown is one of several members that comprise the base of the pallet. For the 900-113 force applied by a forklifiz, determine the magnitude of the force sup- ported by pin C and the normal gripping forces at Problem 41 1 08 4! 109 A modification of the pallet puller of Prob. 41108". shown here‘ For the same net 900-1b force as " Prob. 41’108, determine the magnitude of the f - supported by pin C and the normal gripping f0 atA andB. Problem 4“!” 4] 'l 10 The upper jaw D of the toggle press slides with n :q ligible frictional resistance along the fixed ve n'u 7_ column. Calculate the compressive force R exe , ' on the cylinder E and the force supported by pin atA ifa force F = 200N is applied to the I1 dle at an angle 0 = 75°. nun-lam A" 1 fl 4 l 4% Compute the force in member GM of the loaded truss. Spanelsat3m Problem 4!“ 4I49 Determine the force in member BE of the loaded truss. ir—Tfm'—-‘«—12' B. .C Problem 4I49 4l50 Determine the forces in members DJ and EJ of the loaded truss. L _ 2 L L L L L 2 SpaneisstSm Problem 4! 50 4I5l Determine the forces in members DE. E1, F1, and HI of the arched roof truss. Dimension: in meters Problem 4I5‘l 4152 Determine the force in member HP of the loaded truss. Members FF and GQ cross without touching and are incapable of supporting compression. 9 panels at 20’ Problem 4152 4! 53 Determine the forces in members FG, CG, BC, and EF for the loaded crane truss. Problem “53 4148 Compute the force in member GM of the loaded tmes. w Spanelsatam Problem 4148 . 4149 Determine the force in member BE of the loaded truss. Problem 4]“ 4I50 Determine the forces in members DJ and EJ of the loaded truss. 3 L L L L L 3 SpanelaatSm Problem 4I50 4151 Determine the forces in members DE, 131, FI, and H! of the arched roof truss. Dimensions in meters Problem 4151 4l52 Determine the force in member HP of the loaded truss. Members FF and GQ cross without touching and are incapable of supporting compression. 9 panels at. 20’ Problem 4! 52 4153 Determine the forces in members FG, CG, BC, and EF for the loaded crane truss. Problem 4I53 >4I28 The tower for a transmission line is modeled by the P 4I30 Determine the force in member GM of the loaded truss shown. The crossed members in the center truss. sections of the truss may be assumed to be capable of supporting tension only. For the loads of 1.8 kN applied in the vertical plane, compute the forces induced 1n member-a AB, DB, and CD. H'e——5panelsatD3m flA Arc of radius 16 m Arc of radius 18 in Problem 4130 Problem 4128 D4129 Find the forces in members EF, KL, and GL for the Fink truss shown. Problem 4I29 ...
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