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2008
1 1 ()() 300 150 2 3 1 4H 1 C 12 0 16 Na 23 Al 27 S 32 Cl 355 Cu 64 1 ( 1 26 ) ( 8 ֧ 6 3 O ) 14ۧ 4 ۧ 4 4 784 s lO9 kms 38 A B C D 15ԡ A B C D 16 z 2 ms A P y BP Q Ct=4 s P 8 m Dt=4 s Q O.4 m 17 ( n=1) 3 A136 eV B34 eV C102 eV D12.09 eV 18 M

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m ˨ A(M+m)g B Mg C(M+m)g D(M+3m)g 19 Q P Q 1 2 Pա

20 zқT +q m t M ҧқ N vo A N M BMN CT DT 21 MN B P PC MN m-q () v P B PC MN

( 1 74 ) (k §ҧ 4tt ) 22(17 )I (1)ԧ____________

(2)ԧէ P R ۧࡤ R0( ) R r T E

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(1)ѡ (2)ާ UI T E=V r=Q

(3) P R ____W_______

23(15 ) ] 6 k ֧ d=O8 cm ^=12 cm D32 cm m=120 kg c=06 s ( g 10 ms) (1)ڌ H (2) (3) Fo

24(18 ) Bl R abcd L 2L 0 f 0

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(1)Ձ (2)t3 H P

25(22 ) M L I  (1)֦ (2) ? (3)(2)֧ ()?

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2008
14C 15BCD 16AD 17D 18BD 19A 20AC TA

B

C

21D : PC MN R P MN Q P

PQ=2Rcos =2mvcos MN D 02I(1)C (2) L^(2 ) (1)(3 ) (2 )

(2)4OO V (3)O80 w

465O n( 1 2 ) 50 n( 1 2 )

(1)݌ (2)çҾT E 4O V r=47 (3) P =O8 w R=5O 23(1) H=048 m (2 ) (2) (2 ) (2 )

VM=16 ms (2 )

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<3) tl=t t2= 044 s(1 ) a=ah (1 ) n=364 ms(1 ) F0 mg=ma(2 ) F0=16368 N (1 ) 24(1)t=O a ھT (2 )

(2) ڡH P=O (3 ) ab cd T H 25(1)j 1] t1 1mgtl=Mv(2 )

s1 S2

(2) 1] t1

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