ECS 221 Exam III

# ECS 221 Exam III - ENGINEERING MECHANICS-STATICS E03221...

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Unformatted text preview: ENGINEERING MECHANICS-STATICS E03221 FALL 2011 EXAM 3 November 4, 2011 Name please print Signature SU Identification No. Recitation Instructor Recitation Day Problem #1 Problem #2 Problem #3 Problem #4 TOTAL PROBLEM ONE A light, uniform rod is supported by a hinge at A, a cable BC and is subject to a force 14’ : WSOO +1000]: N . Assume the hinge at A exerts forces in all coordinate directions and moments about the x andy axes but not the z axis. Find the tension in the cabie and the reactions at A. Note that the unit vector from B to C is given by g = H.707{+ 7071' and the cable is in the —. piane. H ” \ “ f \4 A, i = e A}, Mi « ~ t a i J A 4 ~ a J "‘" r a.“ (‘- , ('l :2” {ti/A if?” 2/\ Y i‘ A, J i P .11 V 4/ 1‘ ’ t t ,» \ \ ( I. \ i6} ‘11 m‘ r «'5 r") ...., "i “’l‘“ :- \l 0‘, i I I’M t ‘ “A; a * 2w ><t i {v wwn 3. f-mw: m W i .m‘f L ""' N. J 1’ J l , ‘ K i (V: |I a " \ J "A g 1,! ‘l 0,“ J P g \s ‘ j" 3‘}; 5 i NJ 3‘ { , ‘5 f F' j t? a ( (1V: \; J 1/9” \ S“, .- (":3 / if l L] 47 3:" In) -;',\ .j-a In} . tr»: 5 K [i “.3, / I p) "5 H If '\ 35“ f1 ‘e mi “"1 r‘ 3 K) {v r/ji L4 / ,1 3""? :7‘ '7‘ Av} a x W1 //i 5:: ~ 0 L. I .9 L? 7“ ,4») ' ~< \ i J “\J ,1 ” m J I 1’ f I W PROBLEM TWO A triangular piane area has a circular cutout of radius I“ r—‘r 0.5 in. a. Locate the x coordinate of the centroid. b. Find the voiume obtained by rotating the figure about the y axis. (3 4; <1 4in ~1 \w 1‘ PROBLEM THREE Locate the x coordinate ofthe centroid of the plane area by direct integration. You must Show a]! your work to get credit for this problem. Y 21) I) (" t r \ r \ \ \f 5 1 \ \. .V t p w. ,2 < \ = ‘ H 1 ' ‘ m}. \ ,1 It ~ / (1 j h. “3 .. \i f“ 5'1 :j J \ x f' K ‘” r- J ", “Vt ('n ,7“- Ha. PROBLEM FOUR Consider the simple truss shown in the ﬁgure. a. Find the force in member CE in terms of P and state whether it is in tension or compression. b. Find all the zero force members. 1s. . /"‘" if i ...
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## This note was uploaded on 04/02/2012 for the course ECS 221 taught by Professor Macnamara during the Fall '08 term at Syracuse.

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ECS 221 Exam III - ENGINEERING MECHANICS-STATICS E03221...

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