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Unformatted text preview: EAS 207  STATICS Second Exam
Fall 2009 ‘ Total points: 100 Notes: 1. Closed book exam. .
2. Draw Freebody diagrams and reference axes for all problems i1 _Q.1(a) For the loaded truss shown in Fig. 1(a), use the method of sections i or a combination of the method of sections and the method of joints to find
the forces in member JK and DJ. _ (17 points) 2 W M970 (6) C30), "‘ r r ”2“ l ‘ “ a, "'“‘ “‘“ 4 V
g \\ 3K {8 (0923 46+ \0 gm 2%; j '5 l 60
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\ K} EK”_”5J38EMW “>9”. New Cwicgm 3 oivxii T 6"“ 4—0 a 3126/3573“ Kw Zirco i‘ * 21 5738 Q.1(b) Determine the support reactions at supports A and C of the loaded
frame shown in Fig. 1(b). . , i (17 points) R p: 150 lbft ‘ (“my i 2" ¥ _ I "L" ’ ~ X i 150 1b i
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4“ Ba ,3 . » _ _ N a , ~ '6 4.; 40:35.60 ) ,., W “WW. iiiii Q.2) A beam is loaded and supported as shown in Fig. 2. i) Calculate the support reactions. (8 points) ii) Write the expressions for shearforce (V) and bendingmoment (M)
for a section between points C and D, as a function of x measured from the
leftend support A. (8 points) ' iii) Draw complete shear and bending moment diagrams for the beam ‘ with the aid of the area integration process. Be sure to label the values of
shearforce and bending moment on the diagram. (18 points) ( I? Q \3 me Q; M =1 10XC>< — N)  32 "'‘ 5 (50—2) “‘ RAVCXPEH Pg] (3nyme Q3) A 100Kg cylinder rests against a wall and a plate as shown below.
The coefficient of static friction is 0.3 at both surfaces. The plate rests on
rollers, and friction between the plate, the rollers and the floor is negligible.
Neglect the weight of the plate and determine the minimum force P necessary to move the plate. (Hint: The cylinder may not slip with the wall
and the plate simultaneously). . (32 points) Radix»: 2: lSO mm 0R1; 323W ”J g:ft'wfxt ssuw W'l‘mut +m c. “m 5mg “‘
1 :3 (NRBCE lSO)” (SgiSn/lfox 0 ”MN '— UCR ($90) 0 " i 5 x:
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 Fall '08
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