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Unformatted text preview: TEST # 2, October 31, 2007
CE 180, Section 03, Statics STUDENT PLEDGE: I, [j gig , have not given or received
improper aid on this quiz. E‘JSTRUCTIONS: Read each problem careﬁxlly and think about the problems before you
start to solve them. Show 2111 your work neatly. A straight edge is not requireé. Clearly
Show your answers and use proper units. 1. (2 pts.) What is aﬁee body diagram? .. W
~ 61 9 892 ﬂyocﬂ €122 W (EMU/“7“: é; We“ ﬁe “5%. W W E. e 2. (2 pts.) For the ﬂame below, list the Mewforce membeﬂs). 5 ftw~——————~°i*—2 11—1 E 3. (2 pts.) A rigid body in 3D is statically indeterminate if it has more than
unknomﬁls. 4. (2 pts.) A pin in a truss is statieaﬁy indetemﬁnate if it has more than 2:
unknowns. I 5. (2 pts.) What are the 2 main differences between a truss and a frame? H— .’ .. . ' A 2 C2 ‘WMbe
1W. ,____. ewe 74" e 6. (10 pts.) Determine the reaction at point A for the shoe. $2015 {1?5 in. 3.?5 in. 7. (20 pts.) In the ﬁgure below, support C is ajoumal bearing and support D is a
thrust hearing. The bearings are in proper alignment. The angle, 6), equals 50 ° A. Draw a free body diagram of the pulley and shaft system.
B. Find the tension, T, in the belt. The pulleys are not frictionless. 200 mfﬁ‘x J W St} N gill} mmﬂ\
w“ 8. (25 pts.) For the foliowing truss, ﬁnd the forces in the following members. All
members are 3 meters in length. Draw appropriate Free Body Diagrams.
a. Member DE b. Member BC 3 kN A7 (3 g 9. (25 pts.) For the frame below, a Draw a Free Body Diagram of the whole frame. 1). Draw a Free Body Diagram of each member and the pulley. 0. Write out the method to ﬁnd the force on member ABC at pin B. Write
out in order the free body diagram 113ma the general equilibrium equation,
and the unknown that you would ﬁnd. DO NOT SOLVE. Do not write
out the equations with numerical values. 10. (10 pts.) Find the force in hydraulic cylinder AB ifthe engine’s mass is 200 kg. E 850 _ Eff.
3mm :E W x
‘hﬂaﬁ
X:¥4*I.éo 44) M510 in A
_ AB 693 13664: 350 go. aouﬁmﬂ (1250 4350')
A8 : q&&0\) Cbmrﬁmom ~_,__ ...
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