??????????

admin

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??????????

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1.????????????????

2.?????F?kQ1Q2/r??????

3.?????E?F/q????????)

4.?????????????E?kQ/r

5.???????E?UAB/d

6.????F?qE

7.???????UAB??A-?B?UAB?WAB/q?-?EAB/q

8.??????WAB?qUAB?Eqd

9.????EA?q?A

10.???????EAB?EB-EA

11.????????????EAB?-WAB?-qUAB (????????????????)

12.??C?Q/U(???,???)

13.?????????C??S/4?kd

14.???????????(Vo?0)?W??EK?qU?mVt/2?Vt?(2qU/m)

15.??????????????Vo??????????(???????????) ?? ??????:??????L?Vot(???????????????E?U/d) ??? ??????:?????????????d?at/2?a?F/m?qE/m

??????

1.?????I?q/t 21/2222

2.?????I?U/R

3.????????R??L/S

4.?????????I?E/(r+R)?E?Ir+IR

5.???????W?UIt?P?UI

6.?????Q?IRt

7.??????:??I?U/R,W?Q???W?Q?UIt?IRt?Ut/R

8.??????????????????P??IE?P??IU???P?/P?

9.????/?? ????(P?U?R???) ????(P?I?R???) ????(????)

10.?????? (1)???? (2)????(3)????(4)????

11.????????????? ???????

????

1.??????????????????????,??????:(T),1T?1N/A

2.???F?BIL?

3.????f?qVB(?V?B);???

4.???????(?????)????,?????????????(????)??1????????????????:?????????,???????V?V0 (2)???????????????:???????,

?????? 222

1.????????????: 1)E?n??/?t?????????????????

2)E?BLV?(???????)

3)Em?nBS????????????????

4)E?BL2?/2??????????????

2.?????BS

3.???????????????????????????????????????

???????????????

1.?????e?Emsin?t ?????i?Imsin?t?(??2?f)

2.?????Em?nBS??2BLv ????(??????)Im?Em/R?

3.?(?)??????????E?Em/(2)?U?Um/(2) ?I?Im/(2)

4.????????????????????? U1/U2?n1/n2? I1/I2?n2/n1? P??P?

5.???????,??????????????????????:P???(P/U)R

21/21/21/2

???????????????????????????

????????????????????????

??????????????? Vt = V0 + a t S = vo t +

???????

1

a t2 2

(1) Vt2 ? V02 = 2as ?????????a??? ????????a????

(2) A B??????????

V?Vts

Vt/ 2 =0=

2tAB??????????

v?vt

Vs/2 = o

2

2

2

(3)

???Vt/2 =Vs/2 ; ????????????Vt/2 <Vs/2

(4) ????????????,?1s ?2s?3s??ns???????1?2:3??

2n? ??1s ??? 2s???3s????ns???????1?3?5?? (2n-1)?

??1????2????3?????n????????1?(2?1)?

2

2

2

3?2)??(??1)

(5) ????????,??????????,???????????

??????????????s = aT2 (a--??????????? T--?????????)

2. ??????? ??????????????????????????????????VO??????g?????????

V

?1? ??????? H = o

2g

2

(2)?????? t=

Vo

g

(3)??????????????????????????

(4)?????????????????? ?????????????t =

2Vo

g

?5?????????? S = Vo t --

1

g t2 Vt = Vo-g t2

Vt2 -Vo2 = - 2 gS ? S?Vt?????????

????

1? ?????F = kx (x?????????k???????????

??????????)

2? ??? G = mg(g??????????????????????

?????????????)

3 ??F1?F2???????????????????

???(1) ???????????????????

(2) ?????????? F1?F2 ? ? F? F1 + F2

(3) ???????????????????????????

4????????

?1? ??????????????????????????????

?????

F?=0 ? ? Fx?=0Fy?

=0

???[1]??????????????????????????

[2]?????????????????????????????????

??

(2? )????????????????????????????? ???M=FL(L????????????????????

5????????

(1) ??????f= ? FN

?? ? ? FN?????????????G??????G;?????G

? ????????????????????????????????

??????????????N??.

(2) ??????????????? ?????????????????,????????.

????? O? f?? fm (fm??????????????) ???

a ????????????????????????? b????????????????????????

c???????????????????????????????

d??????????????????????????????????

7? ?????F=G

m1m2

r2

(1) ?????????????????????????????? (2) G????????????????????????

(3) ?????????M--???? ?m�????? R--???? ?g--???

???????h�???????????

a ?????=???

V24?2Mm2

?m?(R?h)?m2(R?h) G?m22

(R?h)T(R?h)

b???????????=????

mg = G

MMm

g = G

R2R2

c? ??????

V2

mg = m V=gR?GM/R

R

8? ????F=K

q1q2r2

(???????????????????)

9? ????F=Eq(F ??????????????????)

10?????

?1? ?????????????????

???f=qVB (B?V)??--????

?2? ??? ? ??????????

???F= BIL ?B?I? ??--????

11???????? F? = ma ?? ?Fx = m ax ?Fy = m ay

????????????

????1???? ?2?????3????

?4? ??? ?5?????6?????

12?????????

???:V= R? =2?f R=

2?R

T

?????=

?

t

?

2?

?2?fT

v24?22 2 2

??????a =??R?2R?4?fR

RT

v24?22 2

???? F= ma = m?m?R= m2R?m4?2nR

RT

????1????????????????????????????????

?2??????????????????????????????? ?3? ??????????????????????????????????????

15?????????????????????????????????????? ????? x= vo t ??????vx = vo

?????? ????? y =1g t2 ??????vy= g t

2

tg? =

VyVo

Vy = Votg?Vo =Vyctg?

2

V = o?Vy2 Vo = Vcos? Vy = Vsin?

?Vo?Vy?V?X?y?t??????????? ??????????????

????????????

16? ? ?W = Fs cos? (???????????

?1? ??????????

?2? ?????????

????------??------????????????-----??------??????

?????-----??------??????? ?????------??-------?????

1p22

20? ????????? Ek = mV?

22m

??????? ?????? ??

6.???F?kQ1Q2/r2 ?k?9.0�109N?m2/C2,?????????? 7.???F?Eq ?E???N/C?q???C????????????????? 3.??????Wab?qUab ?q:???C??Uab:a?b?????(V)?Uab??a??b? 4.???W?UIt????? ?U????V??I:??(A)?t:????(s)? 8.????P?UI(???) ?U?????(V)?I?

????(A)? 9.?????Q?I2Rt ?Q:??(J)?I:????(A)?R:???(?)?t:????(s)? 10.??????I?U/R?P?UI?U2/R?I2R?Q?W?UIt?U2t/R?I2Rt 13.????EA?q?A ?EA:????A?????(J)?q:??(C)??A:A????(V)(??????)? 1.????????????????(e?1.60�10-19C????????????

????? 2.?????F?kQ1Q2/r2???????F:????????(N)?k:?????k?9.0�109N?m2/C2?Q1?Q2:???????(C)?r:????????(m)?????????????????????????????????????? 3.?????E?F/q????????)?E:????(N/C)??????????????q??????

??(C)? 4.?????????????E?kQ/r2 ?r????????????m??

Q???????? 5.???????E?UAB/d ?UAB:AB??????(V)?d:AB??????????(m)? 6.????F?qE ?F:???(N)?q:???????????(C)?E:????(N/C)? 7.???????UAB??A-?B?UAB?WAB/q?-?EAB/q 8.??????WAB?qUAB?Eqd?WAB:????A?B????????(J)?q:???(C)?UAB:???A?B???????(V)(??????????),E:??????,d:??????????(m)? 9.????EA?q?A ?EA:????A?????(J)?q:??(C)??A:A????(V)? 10.???????EAB?EB-EA ?????????A???B?????????? 11.????????????EAB?-WAB?-qUAB (????????????????) 12.??C?Q/U(???,???) ?C:??(F)?Q:??(C)?U:??(?????

?)(V)? 13.?????????C??S/4?kd?S:????????d:????????????????? ??????????P111? 14.???????????(Vo?0)?W??EK?qU?mVt2/2?Vt?(2qU/m)1/2 15.??????????????Vo??????????(???????????) ?? ??????:??????L?Vot(?????

??????????E?U/d) ??? ??????:?????????????d?

at2/2?a?F/m?qE/m ?: (1)????????????????,??????:????

?????????,???????????? (2)???????????????,??????,?????????,????????,???????????,??????

???? ?3??????????????????[???P98]?


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