1、d; f3=:a J : ._ if-: jj E3 Jh ;ff.t : _ -:J2kn (;t:!; 54:r) 1 . (;:jS:2 35J-)(5627) 1j!d:Lt.jHJjf45 1Lp jfnrrfD7.K .lfl1JrtJ, IEJ*fJ!rf tl:HfJ-JWlU/j,:P:Y,JE,I.=umjJ, mlJt1lJmi-ili H1-j(A) :k/j,/f, 1JI:i/f!EJ. (B) A/j,+, 1JI:1J/f. (C) :k IJ+ I 1J +mEJ. (D) A/JL,i EKAEkH . (B) LA=LH, EKAEKII CD) LAG
2、B tIE t AS l 1J 110: 2 (A)- 2 +mgx2 sma 2 (B)k(X2 _X I )2 +mg(x2 -x,)sina J 2 1 2 .(C)“2 k(x2 -xl) -“2kx, +mgx2 sma I 2(D)-k(X2 -XI) +mg(x2 -x,)cosa 2 9. (2j.C:A M, J95:ii:i:)A m. pij:/ik: m 15(J“Y M B /2. (B) t l oH (C) fJ/: ftJij 35-J-) (0 1 37) jt11l H17J:1 1X; T 82f3 17. (:;zjs:,1 35:1)(0230) (C
3、) 18. (:;zjs: 371-)(0137) (C) 1j; (;/* 165-) 19. (:zIs:fE2: 471-)(0008) 8m 2 ;- 10 III 2it 20. (:zIs: 371-)(0355) 2% 21. (.:zjs:Jili1f 4i)(5017) 2m _ -v m+M(2m / M)v22. (.21s: 5-5-;-)(0546) w 2ft lelcos f) 2 5J W=2klsin () I 71 =-vr 1J“1r: (;J:t; 305J- ) 23. (*tMI 100-)(0040)fflif : t/:J, ,8 7J IH;f
4、t J* , It *!IX 7J x $OL fi t Jl( 7J y $rtJ, 1El1JfE JM 7J -y 7J fi, Jf!)(pJ1 Ux 0= 0Uy=a(x-112)2+ b 1 7.1 4- x = 0, x = 191 Uy -= 0, x = 112 91 Uy=-uo l- L, L1. / U = _ 4ua(/- x)x1A J:.- j.“,!E Ll. Ch b, rm ) 12 rKf,ttl xt-fit! EIi: ).:11 I.IJ 7: (A) P trjJjt TFJ 79 M. (B) P J=j Q :J1g llAEI A1 . (C
5、) Q iF.f Jr (:)JbrJJB1. (D) Q .1F!ff;tfIJfifi* p J.tB1 . 3. (*JillIT 351-)(0084) -JJJt 1!: 70 m B Jffi: ;?, 1:1: :1 79 R 8“1 -* r3)!J:I: lm: , Z9J 13 cf f . (B) ffJ l!r1R 7 tL f9J /G !J:m ill /G j“ ,.: , (E) ftJ Z9J ilI:, l)J g ill f t. 5. (:.:zls:HB 371)(0230) -j( rft5 lJ9t .,Ii: : In, ) A I J ; ff
6、i 0.J ; Rfl lill illi 18J 1ft mj, :1m: tJ pN I , (N 1:; BJ uili.1ii XJ=:BJ0 )U jJ) Nsinf)-j1.NcosB=lnv/R 27t N cos B - j.iN sin () = mg 1 7t Rg sin B -v cos Bj1.- 17t -vsin()+RgcosB v2 V 2 _V 2t tgB =_ 1-A1 j1. = 2 I 2 2 = 0.078 27tRg v,v1-=- + RgRg 15. (*f1J jJ if x)t ?jf 8 *JJ f JE JJR 1M rdt = 0
7、- tm/(j) ILq Jill i:; f1 10 ill L!JJ ( 57t) 19, (*JE1l 55-J-)(0988) x. 1*I)rff d CI g 7.=; I -h k R=1 1:11 s;. del (,;:,k R=I f,I. t!:?“ -J;b r.:;, -13 - F.F.l dO)LL. Y“;l,/X“F=J L./J l:rI1 /J)/,rjIX l-.rl1r-J-JSI):lJ* 1.f:U.N:/ , JJj)*. WfFJ., OJJftJ2mt l =r x In D = m :i: 2 :5J LB )J IHit 11: =.!
8、r fn Dfff 1: B -fiID, L ,.: :S: , 1 , ap r, D /2, fi!: 1 M: tr-1-SF lIDL, JZ:mt WL , , 1 , j)IF ffl-r, : MV 2 + m(v2 - u) 2 * fOli-1:8 v2 :;: Vo case + mul(M +m) 1 5J. UilJ 6X :;: muvosin e 1 5J. (M +m)g c-; 3;: .fI JIjJ :_ fj B IJX, B no it)J *A$, lJ.*NA (A) a-JMlk. (B) a-JkIM. (C) 2a-Jjvf Tk . (D)
9、 1 a-JM I k . J2 4. (* 3-5-J-)(0430) .-. J0: :i: AMIi!f! jiiHI f, 7.k f tJJz f_!3.1flt .it1: if1f , m. -.AmlJflj7.kifDMA f, Z-Eill. 7.kfffl, _. 8JAA 1 )(A) -I11V. (B)2 2(M + m)2 m 2 (C) (M + m)-2-v . 2M (B) L13 LII 7 EK;/=EKB . BA (C) Lf = LA EKA = EKB (D) Lf-) - “; .g=(.JB2Js: 551-)(0513) AM*ffimM,
10、 M B / :, IoA x 7J f.if i=IJ *-1 B / t5 l 1/4 fiJB. 11J S “J At: 30mih:)7J I 15m: ./.S =30f+5r (SI) _1 -i c :. =: j_ c-* f =2 s B tl, m:, M B1 t)J rr.u 7JD:i!J:t to fi; rPJ 7J1J o;)1.13. (* 5)(0692) 3 x:$1fJt it. BJ, * Is( r rl iVir T t 15 rPJ 1ffiU rPJ :$: , 1frU ft1 7J 30 0 ,I X:$: 35 m/s (f J! $
11、m?K jJ 1T mE M, :titJ m“j tiWiT i 15 rPJ 1$U rPJ :$ffi, 1ffiU j.fj 45 0 , 1 W FITI tilil tl x,J =f fu IYJ J!if , iiZ i+ r1 tOO ;j: x1 lIB I:t1 J*)J7c /J . 14. JL*lLtffi. OOJJ l)! 5E$fijfj JtjJ Jo JFjjjE$#, t;ftjLiEH JLf J f 11: ? (B o *+1j;j . k-l-a -?/y)1t_. f1J IJ* rEi r. 1i1* 7 y,JI!U j* j 7c/j 7
12、J j=j.1m Y g1 :h EI .tJ WI = L, jdy = fa fL 7gydy = IImg 210 =_ ILmfC/_ a)2 2) 21 y /-(/ 21 “w 1 2 1 ?- = -mv -mv 022 L W= WI+Wr vo= 0 10 2 Wi:= rPdx= rmg xdx = mg(l2 _a )J, J, 1 21 W =_ j.1mg(l- a)21:1:1 -: fOJ 9iQ j 21 mg(l2 - a2) _ j.1mg (1- a)2 =1. mv 2 21 21 2 V=(l2 -a2)-j.1(l-a)2 mlv,o =m1v, +
13、 m2v 2 CD l 1 2 1 2 1 2 -m,v,o =-mivi +-m2v 22 2 2 1 f VI =(ml - m2 )vIO 1(1111 + mJ v 2 = 2mJ v IO I(m, + mJ F =.f 11Mi. fci 2YJ :J915f: A-EK JJ! IJ _ 1 2 -EK -m,V1o2 1 2 -111I V I2 1 2 2=-m,Vlo (4111 l m2 )/(m, +Jn2 )2 -: In? f:ti;J15:T m1 8, 111 1 Z9J f1J.1 iA, 1112= m l R, Jn l Z9Jt1J! 100 % . 1
14、7. (:;zjs:R2 85t)(0115) M: rAdr*OO dM =Jl mg .2n r .rdr nR 2 M = fdM =JlmgR IIJ;1Z jfj no:II /: jJ=M/J 2 n =-= 3ROJo /167T jlg4reM 18. (2js:fi!2 551- )(0784) fWf.: ili T stf!, fll t* , I J *Bj /3iJ (C) /3;1 /311 (D) JHt:1 01 /3;1 =/3H r.a J /3A /3H -0 li; (:J-t: 1 77-.J- )6_ (:ijs:)i!2 4:n-)(0509)Ri
15、llm, *V=d2 (c :;.) , 9!lJ)- t = 0 IJ t 8-lJmJEttiJ%f S(t) = ; t a1 III JJfl:ig a“ = -7. (;zjs:JMl 45:1-)(0605) 8. (2fs:JMl 3:5t)(5630) -1-n tJ! ;tJl, Jj iJ M:i: m I tIt G M:i: 1F:X i9: Jj l=J tJ! 1E1 illjtJ:i 811112 70 JG i: I $-111l.JQtiJl1i!lH:F BJ rElJ 1bZW, D:!IJ IJ 1Ji!lHij l=J fIt zyJ JiHilP-Ku 9. (:z1s:JMI 3:5-)(0685) :i,znl!flM7F, 1ftiJ A fm B 3fQ1+t c mM:i:7JIJ 70 11111 mliQ me, m!ffifJ1 R, lHt.xo$ll:im:tZlJ tm -;: J-= - 111cR2. YrJ:l3: A !J*00 raj /ffl-$t $B371czJi3J 2 j$J x.lAft , Er0 itPJ /G i-I-, 1 tffi z raj 7C10 X1 m 10. (*H2 35-J-)(0248) .
