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hw_p3 - 466 m1 mdmmmh ‘ thlgm 15-5 A brass cube so mm on...

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Unformatted text preview: 466 m1 mdmmmh ‘ thlgm 15-5 A brass cube so mm on each edg: is «amassed in two papendiculu directions by forces p : 175 H! (see 5501:). cue-um me clung: Avin m: volum: of lhe cube und 0.: min energy U men in the cube. assuming E :0» GP: and u = 0.34. Salullnn 1.5-0 mum mas-cub. CHANGE ‘“ ”W“ l ‘ 1!! Eq. r141): — v - b’ 7443 x 10" («71 + In) (50 mm)3 25 ><103mm3 A 2V0 z —56 nun’ <— (Dumas: in volnm) STRAIN may Sidzb = so mm P 175 m E]. (7.50): n = 3-075 + a; — Iw‘uy) E = 100 GP: v = 0.34 (aim) "5 = 0.03234 MP: 175 kN)2 = —70.0 MP3 U = w" = (0.03234 leuzs x 103 m3) 50 mm) = 4.04 .v <— PmII-m 15-9 A 49-inch wbe nfconcmu (E = 3.0 x 106m 1! : 0.1) is compmled in bl'axl'al mm by means on imiuwnrk 0m is mud as iiinwn in the figure. Assuming am my. land r equals 20 k. derannin: me clung: AVin [he volume of nu: cube and m min mgrgy U stand in the cube. Snlnlmn 1.54 Biuhl m — alum cube DWGE IN VOLUME m. (7-47): e = %a, + 17, = 00009429 (4' .)3 = 64 in} .0603 in.3 <— 0 AV V0 (Because in volume) STRAIN may Eq. (7-50): u = E‘EM + 0'; — pry) 0.9377 nii u=uvn 50.0 ..in «— ...
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