Statics Exam 4 Retest

Statics Exam 4 Retest - Name STATICS ENGR 2050 SPRING 2008...

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Unformatted text preview: Name: STATICS: ENGR 2050 '- SPRING 2008 EXAM 4 - RETEST APRIL 23, 2008 Instructions: 1. Write your name at the top of every page. 2. Pay attention to what the question is asking. 3. Show all your calculations; draw BRIEF pictures if you need to; state any assumptions. 1. (30 pts) Determine the forces in members DF, 3 k}? 5% l 341‘ EF, and EG of the truss with the loading shown. B D / F USE THE METHOD OF SECTIONS to do this. 4‘; a?" ‘i Indicate whether the forces are tensile or ' §7 'k compressive forces. (The support at A is a pin 4;. ; p : . 1 .. and the support at G is a roller.) z; g: i rep cl Grazia; w "'“ 32M rzw‘ AA/ , use s; Ax l; C 7 b 3 :72 1.29 1742 6 7M -0' —%W(:.2rpm)—u"”(2 52 )4“ (gjgmh 3 7 A ‘ I l I D 0 wt a F8 Jeitflwl ’DFbt—F 2 1‘14 l.’l m FEFIJti/l Fee—RTE“ (a! k] (P i -. v 4 ZS"; —7.15 a o 7‘ 2 ,, J -) l L: V 1 11) iFy ’“ ’FDF ’l TIM/PEP JV gel ’5 ier Page 1 of 3 Name: 146 STATICS: ENGR 2050 - SPRING 2008 EXAM 4 - REI'EST APRIL 23, 2008 2. (35 pts) For the shaded cross-sectional area shown below: a. Determine J? for the shape (the horizontal distance to the centroid, measured from the y axis). b. Draw a vertical line at this distance and label that the y'axis. Determine the moment of inertia of the area about the y'axis. x l<——>l<—+l<—>I+>l+——->| 3n ‘ 2n 2" 1" 4" " I, ” A U i N l I; I/ -,,-_r,_ 2 -. $329939 1&1 X ’, >+ (5+ #4 D 44 W LTMW 2 , 2A (80(40- (21M «0+ gammy“) */ ~ l u A 3 ">’2”>[3‘LZ‘OIB”)LJ f, _, +1(4u>(9~)3+(4")(5”)(Z‘0téb vl>z‘[n()l’2) +0 \ D I, I] Z t *[éumxmfi éww'vlasaw-72.0w > Y \th/ : V14. 1;. z 575% It: gm“ Iy=§flr4 , , Triangular area Semicxrcular area Page 2 of 3 Name: @‘l STATICS: ENGR 2050 - SPRING 2008 EXAM 4 - REl'EST APRIL 23, 2008 3. (35 pts) The tool shown is used to crimp terminals onto electric wires. Knowing that a worker applies forces of magnitude P = 135 N to the handles, determine the magnitude of the crimping forces that are exerted on the terminal. Dimensions in mm I” )M 100 ywm 7#_’ M 93 lZS ’ law DX ‘i' fix ii 0 . ,p itwwwwmr 3 G :MFZO' b) M ,4} or! has @404 “Wm '05: — \bbS ’5 Db: “J‘s ‘3 ’7' 9X @EMD-«Oi “Ecumt'wMM)+lUbSN(4ONm)‘O Fm Fae MS“ ' 7» —. ZZZoNi (in Am) Fit/m ‘ Z’ZZOPJ '} (on ‘H/lt (Elfhh/ié wer ken“ — 7 7 ' Alfryv./\_al) Page 3 of 3 ...
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Statics Exam 4 Retest - Name STATICS ENGR 2050 SPRING 2008...

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