MEEN 221 Exam 2

MEEN 221 Exam 2 - MEEN 221 —Fa112007 Exam 2 November 15,...

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Unformatted text preview: MEEN 221 —Fa112007 Exam 2 November 15, 2007 Dr. McVay Section: Name: Student Number: "Aggies do not lie, cheat, or steal, nor do they tolerate those who do. " — Aggie Code of Honor By my signature below I pledge that my conduct on this exam is consistent in every way with the Aggie Code of Honor: Signature: This exam consists of Five (5) problems that are weighted as shown. Some problems have multiple parts. Be sure to carefully read and properly analyze each question that is asked. Do not jump to unfounded conclusions, but also do not overlook or oversimplify problems either. 4. Be sure to show all work, including sketches, Free Body Diagrams , and calculations, and organize your solution procedure as clearly and systematically as possible. Answers must be justified. 5. Work problems in the space provided on the exam sheets. if you need extra space please use the back of the page and indicate continuation of the problem. Work efficiently, neatly, and use pencil. Clearly indicate final answers by enclosing in a "box" or place answer in box if box is provided. include any and all appropriate units. Answers should have 3 significant figures. No electronic device of any kind, except a hand calculator. is allowed. Do not write your name on any other page of the exam. 9N.“ NF” 50.00 TOTAL: Problem #1 (20 points) Determine the axial forces in members DK, LK, CD and DL and if the members are in tension or compression. 15 kip 15 kip I k—9ft—>i<——9ft—>l<—9ft—>}<—9ft—>—| E N .mo< .0nE0E 0o 0 0:0 .m .< Em £000 .0 000.2 .6 0E0canoo > 0:0 x 05 Amy—:00 m: A0 “055000 km. .< Eon “0 m. 0.x0 > 0:0 x 05 .6 E98 05 082 .5520 00 3E0.— 05 #0 005.5 0.0 “05 0.09:0... 00.2 00:: 0:0 00.2 9.3 .6 U0manoo 0_ .5203 E5050 E0um>m $56350 05. A3500 on 50: an .m an... E0395 "3.2 "03> .Em vvaN "3.2 uoo> .EN vxvo 3 8582 2:9“— .uquoa 3.5 5 295cm mofln. .m_0< LmnEmE Emma 05 .0». cos. EwEoE 9.659 9: can 03> 00.6.. 595 05 8.. cozmzmm m5 Amqun m5 3 6555ng 60:528. Nu Ease". Problem #3 (10 points) Determine the second moment of area for the shaded region shown in the figure with respect to: a) The x—axis. b) An axis through the centroid parallel to the x—axis. The centroid coordinates are (0,5/7a). Place your answers in the box provided below. b) im .3205 “63>on xon 05 E 53mg 59» 085 .558 :3 How meg—Emmch :5 $3250 .8593 83m? 2: mo :8on 955095 3:8 53 35 m 88% “mozafim 05 088.6on .8829 “5 88 one 05 98 Q 85.6 63mm 2t 59533 E505 2: .859? mm doflsm ammo“ 05 was V V25 5038s CNd was m x03 can V xon #50363 mmd mm cocoa own—Sm mo E30508 2: .£ ow 3903 m >95 93 £ ow Ems,» V xom €2.ch cNV v t 50395 Problem # 5 (20 points) Consider the 3-Dimensiona1 Truss shown below. a) By taking suitable moments (or otherwise) , find the Z components of the reaction forces at E and D. b) Find the forces in the Bars AB, BE ,BC, AC, AB, Indicate the magnitude of the force and whether it is in tension or Compression. ANS: Reaction Forces: Dz : E2: Internal Forces: AB : BE: BC: AC: ...
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This note was uploaded on 03/30/2008 for the course MEEN 221 taught by Professor Mcvay during the Spring '08 term at Texas A&M.

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MEEN 221 Exam 2 - MEEN 221 —Fa112007 Exam 2 November 15,...

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