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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'mofaweterproofedIGin. wbeiaﬂoetinginatankofsaltwnterwithaGin.
layerofoilﬂoetingonthewnter.Aaeumethalthe
wbeﬂoeteintheatﬁmdeshomandcelculatethe
heighthoftheblockabovethemrfaeeoftheoil.
Theepeciﬁcweighteofoiimaltwatermndwoodare
56, 64,8nd501blﬁ3, respectively. Problem 5] 'l 98 5”” A freshwater channel 10 ft wide (normal to 5/200 A channelmarker buoy consists ofan 8ft 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 nosewheel 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 twoforce 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
twoforce members. 20 In
Ah F
a s c D E .
L L L L
15 m~>J15 m~>L—20 to +15 med615 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
wheeldrive 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 ycomponents 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 doubleaxle 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 Duallam 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 900113 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 9001b 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°. nunlam 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 membera 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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 Spring '08
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