1、Chapter 1 （Omitted ）Chapter 2 2.1 b,c,d,e2.3 06sin4i 93coP1.98305kNP2.13 2.9).sin6.(i)15c8.0(c 3.18)0sin6.15si()co. FF39 0N2.20 mNmMzyxzza iMja0 )12.48.(.0 6.62.23 b.d.e.g.i2.28 mxxxkF 25. 48)5(12)7(6(0 12 2.33 150848382308483 23221223 TTFTTzyx NT5.207418.6Chapter 33.2 1 0612 0 0 63129 kNNFmBBy AAB3
2、.8 Analysis AB: couple.) afrm and ( opsit 9 BC 960208.)c(18 BABBA 3.17 For the entire frame 5.0mFFFor the BF 40 85.X 0 NXNDDBFor the DE 24YYE3.28 (b) For the BC cos2 01cos 02aqqamCCB a aqXA AMA YAYABPCP NCFor the entire frame 22 1 02cos3 0 qamaNqamACAA tgXXA sin qaYNqaYCA 21 0co 0(e) For the BC cos8
3、 412cos NmCCB a/2 a/2 a/2 a/2qXA AMA YAYABPCPFor the entire frame 22 43 02cos 0 qamaNqamACAA tgXXA81 in qaYNqaYCA 7 0cos 0(f) For the BC 42 124 MmDDC 2m 2mNB2m 2mq MBPCPXA AYAYAFor the entire frame MqNMqmBDBA 216 0842N 0 AXqYqYADB2541 04 0 3.39 158 617 125 127 PTPTTP CBCADAB NCDNDChapter 44.2 Ib 78
4、05.492.1306.sin 0 CDCDx NctgNm5.613)(78ozzAy BIb cs CDz ABZIb 40 )15.2(95130sin0 yyAz I25 0i CDyNY4.4 DB and BE are two-force bodies. 3 PFmCzy43 0DzEzxFm PFZEzDz 145 710254 0PNPNEzBDzB 12 1254.5 For the entire shaft y5 0For OBD mxDz 9.43 0 zDxBmFor the entire shaft NGXNExxGz 3.75 2.86 .20 .150yzx Z4
5、.19 (55.65,20.65)iCCiCvyv 65.201342052)0(4.)134601252( 22 Cyx4.25 （0，1.88，-1.87）Handle （0， ，-1） 316)(21vSides （0，0，-2） 4)3(22Bottom （0，0， ） 643123v87.1 8. iCCiCCiCC vzzyvxChapter 55.1 NFWTS0sincoSStgT215.11 Study the ladder, when F is toward upNWxTMWYXSA 075.168.1cos6.2sin00co i 211 mxtg68.3.2145.when F is toward downNxTFYXSA 075.168.1cos6.2sin00co i 211 mxtg46.5.281.Therefore, the ladder is not in safe.W1W2FN T5.17 Study the BDF 8.0562 . 025.110 body) frceTw:( 73 50322FS FBBE BDDBNIbNXYM DIbYI
