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Unformatted text preview: (tat g: 33w gnaw Egg (5 3 ’ uou 2.
EM 201 Test #3 at 7* D7 March 30, 20053;] Student Number: Kg
Pmblem #1 (25 pOintS)In the frame shown, the members are pinconnected and their weights can be neglected.  Find the external reactions on the frame at A and D. l. 3% J?
o Find the forces at A and B on Him bier ABC, and Show them on the member, below. ~__a l‘: FRED ijzmgso: qu ‘3' LOLA!) "' 334 W {Li ' *5 EWIO= 0 Db {MN + m ' 4, 9 From Groupwork! .— __ . . ' ' u “A” I11 5 Ax: Oi KM a
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E .L ZF. _ \N ___ m_ '3x ‘I, I‘.‘ I I __ _ is: :. 'jw,l=.‘.,:..../1 ' H "Q" q m 69” .  135W m..:§::g._;i Gaiwi {710 \aQ EM 201 Test #3 March 30, 2005 Student Number: _ K 6;; Problem # 2. (25 points) Fred, who now weights 240 lbs, hangs from the truss, bClOW. Determine the forces, in _. an  ._ .r as , a ,9; ,. .7,
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{ydM L‘i' w Luﬂﬂ \ ﬂ : aw U3 M EM 201 Test #3 March 30, 2005 Student Number: Problem #3 525 points! WP Determine the centroid of the composite section shown in the ﬁgure. Give the coordinates of this locationrelative to the given xy axis.
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th ' —«—9 EM 201 Test #3 March 30, 2005 Student Number: Problem # 4. (25 pts) W a: 4 m
_ 2 _ k
For the beam and loading shown, vertex b F 9 m
determine the following: w] = 6 Ext/m
' wz : 18 I‘d/m (a) ﬁnd the magnitude and location of the resultants for each of the distributed loads.
(Show these on the beam provided below.) _ triangle (b) show each resultant load (from part a) and its
corresponding location on the beam below (c) the reactions at the beam support. i? , R: 90603.: ‘2 Wm M i‘ ; Ll — 0‘39, ' M  "
hlf’ 0" “We” s“igﬁl‘lel'kbj ‘<—ﬂ—> “b “ﬂ: I; “L IO :5" (d) On the beam, below, show the magnitude and location of the resultant of all applied forces {i.e., the resultant of the point load(s) combined with the distributed loads}.
(Note: this should be egufvalent to the original ﬁresmoment loading, above. )  ‘w ’ . M
45‘ “Km to .: 25:0,: wins! >2 32—5—93 1 r3 130.63% a W . " " let. “a; H/W‘NJ EM 201 Test #3 March 30, 2005 Student Number: E u Problem # Bonus*: (5 points  toward test score, g you qualify) lggg’; ﬁg ggg timea bggg! Credit will only be given if you complete the entire test and if the problem is 100% correct.
Bonus points will only be given if this problem is 100% correct. Taking pot shots at it won’t get you.
bonus points: The extra points (if any) will be added to your test score. A small bolt cutter operated by hand for cutting small bolts and rods is shown in the sketch For a
hand grip of P : 30 lbs, (a) determine the force (in lbs) developed by each jaw on the rod to be
cut, and (b) determine the mechanical advantage of this tool. _ I2. .: l: P
QEMNO ) {00 B = ‘20}: ) Eir— it
180 " 20 60“} ‘
 Dimensions in Millimeters l: .2: 35 2500 H? F ...
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