1、17 1C ABCD 2D IIm2RPI2RP0.625 WAT0.01 sTBUE2UCIm0.5 AUmImR2.5 VRutVD 3B 4st=2sP5cmyB 4B t0A0t0032xB3t0 x =3x0 x=4.5x0012xCtD 5C A3m/s29m/s29m/s2B6m/s20CD 6D 12h 2h 1 h 2 27 sin2sinn =D 7A F=mam 002ma xA2x02x0Ba0CD 8B CDDBDACBDDCDCACtancosFmg12mgB 9BD ABCD 10AD y22gh0 =y=30m/sAt=sx=20t=90mBatgg tCD 1
2、1AC ab abAabcfabBedCaabbbaabD 37 12BC aF0F0=2ma t0032sin30 =2FmgmaAk012sin30 =mgkxt28=mkt012fsin30=k xxmgFmaf=0FB01+2sin30 =2F k xxmgmaF0tFCt00cos30sin30 =mgmgma000cos30 =+sin30mgk x mgD 13. 6 1BD 2 2 12.710 2 6502 1xdlBDAC 2x212.5 mm0.0121.0 mm12.710 mm1nxx-1xn-1xdnl650 nm 14811001 1 22 3512 22 126
3、2600 2Rx60mAR060mA3 33Rx=IIRU320=51Rx=0SS0=023IRUlI=2mm2 157p0G hSp0 (h - h1)S 47 p0hS=()(h - h1)S 2 V hS- Vp0 1 hS - h2S- V1 p0(hS- V)=()( hS - h2S- V) 2 121()hh hSVh 1 1691 1 AFBIL 1 AFF 1 2EI Rr 1 EBL 1 txt AWF x 1 1 2()QIRrt 1 1 W=QtWQ 1714 1Ath kk0mghEE=-1 h=gt 1 x= t 1A=2gL1 2BA01 57 2m0=2m1+ m2 2m022m12+ m2 1 0=324gL H 2mgH2 mgL=2m020 2 HL 1 3A2 h =212gt x =2 t A 1 12gL=1BA02 2m0=2m2+ m 2m022m22+m2 0= H 2mgH2 mgL=2m020 HL 1 1816 Ey 67 ta d=0t 1 1 2qEma 1 yx, yat 0tan1y45 1 R1 1 122dR 1 1 EyN01yN2x1tan2 122222qBmR 254dR 1 1 3yy0 77 M1 N220sin324=2dddt1 s210stts d
