特定目标：例例一例二hr

111.2.3.11.1(a)6iicimrrm∑=∑JGJJGcrJJGm1m2m3m4aABCDAC76(b)ddxmxm∫=∫andddymym∫=∫xx=2y2=4xx(c)ABCADEBCED287(1)44hhyh=++.77hrAω11.2(a)6=()2212mrω∑II2mr=∑(b)(a)(b)78(c)(a)(b)Md2Md(d)()AABC11.3(a)m2aABAmBABAB79θθ(b)ddIItωL=θ=LddvmtF=10kgm2ω020NmILθ=2θ=02tθ=ω+201(2)2ttθ=ω+vuat=+212sutat=+aMPmQ2mQtx80x=aθxa=θPQmaAωAa/22mPP()(c)ddL∫θLt∫8111.4(a)16(1)(2)(a)(b)82(b)AB2a'm'()A2θθFRABAB832a(x,y)SR(c)aIFaθ=sinmxmgF=α−Axa−θxa=θ84ωutθxAxa−θ(1)uaω(2)u=aω(3)uaω(d)Mu=221122uIma+u3485m