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Extra Credit Brown Bag

Due 8/30: Homework Chapter 1: #4, 8, 13, 17, 20, 21

Due 9/6: Homework Chapter 2: #2, 8, 10, 18, 24, 31, 44, 59, 69, 74, 95, 97, 106, 130

Answers: 2)960N@45degrees, 8)6kN,3.1kN 10)924lb(i-hat)+326lb(j-hat), 18)19N@-24degrees, 24)F*sqrt[2+2cos(theta)], 31)1732N, 44)103lb@30degrees, 59)11kN@48degrees, 69)377N(i-hat)+166N(j-hat)-125N(k-hat), 74)125N(i-hat)+53N(j-hat)+384N(k-hat), 95)-52.1lb(i-hat)-156lb(j-hat)+365lb(k-hat), 97)-649N(i-hat)+389N(k-hat), 106)466N(i-hat)+339N(j-hat)-169N(k-hat), 130)74degrees, 55degrees

Due 9/11: Homework Chapter 3: #3, 7, 13, 23, 37, 45, 53, 58, 67

Due 9/18: Homework Chapter 4: #16, 21, 24, 28, 31, 47, 52, 57, 65, 68, 69

Answers: 16)39.8lb; 21)27.6lb; 24) 4.97x10^3kg; 28) (60(-i-hat)+26(-j-hat)+32(-k-hat))m`kN; 31) (24(-i-hat)+24(j-hat)+8(k-hat))m`kN; 39) (82.9(-i-hat)+96.8(-j-hat)+52.8(-k-hat))lb`ft; 47) (16.04(-i-hat)+32.07(-k-hat))m`N; 50)(374(i-hat)+100(-j-hat)+173(k-hat))m`N; 52) 15m`N(i-hat); 57) (11.5(i-hat)+8.64(j-hat)lb`ft; 65) 5.66N; 68) 800N; 69) 75N,100N

Due 9/25: Homework Chapter 4: # 101, 110, 121, 128, 134, 136, 142, 146

Answers: 101)40m`N cw; 110) [-5.39(i-hat)+-13.10(j-hat) + 11.39(k-hat)]m`N; 121)356N@-51.7 degrees; 128)18.0kN,16.7kN,48.7kN; 134)[121.8(i-hat)-182.8(j-hat)]m`N; 136)2.68m,-0.23m,-1370m`N; 142)3.40m; 146)-81m`kN

Due 10/2: Homework Chapter 5: # 15, 16, 20, 21, 25, 27, 36, 41, 43, 44, 49

Due 10/9: Homework Chapter 5: # 64, 65, 66, 69, 72, 73, 76, 78, 80, 82, 84

Answers: #64: Max=1225, May=750, Maz=0, Ax=400, Ay=-500, Az=600; #72: Ax=3200, Ay=0, Az=-4000, Tac=Tdb=4310; #76: T=1373, Max=785, Maz=588, Ax=1177, Ay=588, Az=0; #80: Ax=16.7, Bx=-16.7, By=-50, Bz=Az=0, Mbz=0, Mby=-900, Mbx=-300; #84: T=58, Cz=78, Cy=-25, Dy=-69, Dz=32

Due 10/30: Homework Chapter 6: # 1, 3, 6, 8, 10, 15, 16, 19, 21, 25

Answers: #6: Fde=1000N-C, Fdc=800N-T, Fec=900N-C, Fbc=800N-T, Fae=1750N-C, Feb=750N-T; #16: Fcd=9.24kN-T, Fde=4.62kN-C, Fce=9.24kN-C, Fbc=9.24kN-T, Fbe=9.24kN-C, Fab=9.24kN-T, Fae=4.62kN-C

Due 11/6: Homework Chapter 6: # 52, 65, 69, 77, 82, 83, 97, 98, 104, 118

Answers: #52 Fge=6KN, Fgd=4.47KN, Fgc=4.47KN, Fed=9KN, Fea=6.7KN, Feb=0; #104 Fac = 12.9x10e3 lb, Fad = 2.4x10e3 lb, Fab = 11.9x10e3 lb

Due 11/13: Homework Chapter 7: # 9, 11, 14, 23, 25, 34, 42, 51, 65

Due 11/20: Homework Chapter 7: # 70, 71, 73, 78, 89, 95, 98, 103, 107

Due 11/27: Homework Chapter 8: # 2, 3, 6, 17, 26, 31, 39, 41, 46

Due 12/4: , Homework Chapter 9 and 10: #9-2, 9-26, 9-27, 9-28, 9-29, 10-3, 10-11, 10-19, 10-23, 10-24