1、dqUqEmg2022121mvmvqU mqUv2 advvdUmqEa2,E,202dUULvLmdqUaty022242121 2202/LydUULdmvUqLvvtany tanLy2 dUULvLmdqUaty022242121 0220242dUULmdvqULy yattan2,122002qUatvq Umdvll2mdv02讨论:因为相同,当相同,则 、也相同因为相同,当 相同,则 、也相同因为相同,当相同或相同,则 、也相同(1)vq / mytan(2)mv / 2qytan(3)mvmqq / vytan00200(4)UqUmv / 2ytanmqytan02设加速
2、电压为 ,由,有 ,即不论 、 如何, 、也相同ll22UU4dU2dU2022mdVqULy LdALBCSLlv0v t ABCy 0tanyxvatvv20111tan222lyatatlvtan12ylLdALBCLCOMNO3 /2/2NOLdL34dNO 3 /2/2/2MOLdL32dMO 34dMN LdALBCLCOMNO42ddy222qULymdv22222kqULqULEdd222211222EqUqLyattmmdveUmv10212竖直方向: 即 将代入得:hath2121224222202221eUmdteU LdmvhULdUmeUV112221aty mdeu
3、a 2122mdVeuLy 21202120222LUdUdmdVLeUym,2tan211LymdVeULVV212mdVeULy yy2/LD2L14)2(dULUDLy 104)2(dULUDLymPmqEa vtx 221aty 2211xtamq 4:2 )xx(mqmqabbbaa20121mvqU mqUv102 0vLt 1222022242121dULUvLmdqUaty qydUqqUmvt 21221qmqUmvI 102dUE 221atd mdeUmFa24eUmdadt22 meUdRtRv20 2022221mvqELtmqEL qLEEk4 kktEEqEL k
4、kktEEqELE5 0mvqELmqEtvy kykkELEqmvLEqmvEE4221222202222 qL)EE(EEkkk 2kkEEqEL qLEEEkk 221atcosl sinlcosva2202 2202sinqlcosmvqmaE 220222022cotqmvsinqcosmvcosElUAB cotvvy02 2202202022121)(212121yyBABmvmvvvmmvmvqU qcotEUkAB 204 离离子子束束真空管真空管ABULt1图图1离离子子束束真空管真空管EABCt2UL图图2221mvqU avvLt22 2221421tEULUmq 22
5、21222tEUULmq 2122UtLmq m/qEvvLt2 m/qEvvLt 2)vv(qEmvvLttt 2 02 qEmvvLqLvmvE 2dmqTU)T(dmqUT)TdmqU()T(dmqUs18732133232220200201 dmqTU)T(dmqUs1832120202 dmqTU18720dmqTU1820,ddmqTUs2187由201 22079得qTmdU ymvTdqUI 30mdTqU)TdmqU(mmvWy222202021832121 B解解:电子做类平抛运动电子做类平抛运动 a=qE/m00330VctgVVyVy2=2ay =2qEy/m = 3
6、V02qmVEyUAB2320解解:20121mVqU 1202qUmV122022tandULUmdVLeU B20222121VLmdqUatyEK= 4.25 EK ABCmgqETmg)sin1cos23( mgTP PK KhdNA AB BMMO EPOv0mgqEvMvyvxvtd=2cmv0=2m/sL10cm+ + + + + - - - - - qEmg04年海南理综年海南理综352202qlmvd2202qdmvlqdlmv0mdlvq0C. A.B.D.+ + + + + + +- - - - - - -dv0AOBCOACBE+q mmg qErgvB1rmgmvmvAB22121122rgvA15OACBE+q mrgvA12rgvrgvAA11520或