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# test11 - COE 2001 — Test 3 — Fall 2006 Name K9”...

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Unformatted text preview: COE 2001 — Test 3 — Fall 2006 Name: K9”, PLEASE NOTE: 1. If axes are speciﬁed for a given problem, you are to use them. Do not change them in any way or you get a 0 (zero) to that question. 2. Show all work. 3. Provide units with your answers, and box them. 4 If the “lb” unit is used in this test, it means “lb-force,” NOT “lb—mass” (i.e. do NOT multiply by gravity to get a force!). 5. Deﬁne clearly any new variable you introduce in a problem based on the givens. Pb. 1(35 pts) The cross section of a structural-steel angle is shown. Neglect the curved portions and consider the section to be composed of two rectangles. With this assumption, compute the x- and y—coordinates to the centroid of the section. Compare your re- sults with the published values of X = 1.65 in. and Y = 2.65 in. for the actual angle section. 81/ Pb H (65 pts) — The three ﬂat blocks are positioned on the 30° incline as shown, and a force P parallel to the incline is applied to the middle block. The upper block is prevented from moving by a wire which attaches it to the ﬁxed support. The coefﬁcient of static friction for each of the three pairs of mating surfaces is shown. Determine the maximum value which P may have before any slipping‘takes place. @>'—5 NE: “ﬁg: O-qN32Q27.6(\) J P: “7.9 MC: l/O\?.4’N *4) 4c, max : (lg-MC : M @3-A iatzquexu <~§flw (::). (Meg m T . “yviﬁwc ﬂ % P/V lac, \ MP‘ \O/R/N’c ﬁ:T,£ﬂ-wﬂ§Wa—§Om. iFyzwA,LJp‘oo>§3':o (z) &@= mmﬂwLﬁJweWc)WW4?) 3R : Nab NA _ (0)04. 03C) ed?o:>o (L3 4 N4; = awe N .5 1L“: 0.3m =763N A NC :_ .__J) :{C I ﬁcmx 2 : M (2) .9 P: (MIN @ .9ch > um. ‘Akhuer: 7P;; H7za A) Cd¢_(j Opﬁgucﬂi cum JaAqL ,(g C %wax 3“ W® JN warn @ (ism/VF mm: whim +0 @1 Mg: Ug+wg cask): “VFW “5 AQBvux =04 “8 W188: P+ wgixw3a_3Lq :264‘2/N> #WGK " W @ cam/04' inﬂowyca/k‘. 2&216N ...
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test11 - COE 2001 — Test 3 — Fall 2006 Name K9”...

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