上 传  者 : 赵海波
单      位 : 海阳一中
上传时间 : 2011-11-20 00:00:00
高三物理一轮复习—变速圆周运动学案.doc(336KB)
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http://tbzy.k12.com.cn K12??????/????????/????/??? ????????????????? ???? 1????????????? 2????????????????????? ???? ???????????????? ?? 1????????????????? A?B??? L=0.8 m?? ???? v=4 m?s????????????????????? ??????????????????????????? FB?FA?(g=10 m?s2) ? C ? A.1?1 B.1?2 C.1?3 D.1?4 ?? 2???????????V????????????????????????? ?? D ? A. ????????????? B. ????????????????????? C. ????????? D. ???????????????? ?? 3????m????????? R????????? ?????????????????????????? ???? V??????????????? ??????? ??????????????D?? A. ?????? R vmmg 2 + B. ??????? R vm 2 ? C. ??????? ?mg D ????????????. ?? 4????????????????????O?????????? ??????????????????? a?b???????????? ??????????????????C?? ?a ?????b???? ?a ?????b???? ?a ?????b???? ?a ?????b???? A. ?? B. ?? C. ?? D.?? ?? 5???5?9?????L?????????????????????????? ?????????????????????????? ? ,?????????? BC ? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com V b O a http://tbzy.k12.com.cn K12??????/????????/????/??? A. ? ????? gL B. ? ??????????????? C.? ? ? gL ??????????????????? D.? ? ? gL ??????????????????? ?? 6?????????0.1kg??????0.4kg??50cm??????? ????????????????????????????????9m/s? 10m/s??????????????????????????g?10m/s2? ?????????????????????????????? =1m 0.1kg+0.4kg=0.5kg?????? 4.02 =m kg ? ? ? ? ? ? ? ? ? mg ? ? ? ? ? 1TF ? ? ? ? ? RT mgmF 2 1 1 11 ? =+ ? ? gmmF RT 11 2 1 1 ?= ? ??????????? 1TF =76N??????????? 76N?????? ???????? gm2 ???????? 1NF ?????? RN mgmF 2 1 1 22 ? =+ ? ? gmmF RN 22 2 1 1 ?= ? ??????????? 1NF =60.8N ?????????? 60.8N?????? ?????????????????? 2TF ?????? gm1 ???? RT mgmF 2 2 2 11 ? =? ? ? RT mgmF 2 1 2 11 ?+= ??????????? 1052 =TF N ?????????? 105N?????? ? ? ? ? ? ? ? ? ? ? ? ? ? 2NF ? ? ? ? ? ? gm2 ? ? ? ? ? RN mgmF 2 2 2 22 ? =? ? ? RN mgmF 2 2 2 22 ?+= ??????????? 2NF =84N??????????? 84N?????? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com R ? http://tbzy.k12.com.cn K12??????/????????/????/??? ??????????????? ?? 7?????????????????????????? R?? ????????????????????????????? ????????A????? m1?B????? m2??????? ?????????????????? v0?? A????????? B????????????????????????????? m1?m2?R? v0????????______? ???A???????????????????????? ????????????????????????????? B????????????????????? B????? ???????? ?????????B???????????? v???? 2 022 2 2 2 122 1 vmRgmvm =?+ ???????? ?? A?? R vmgmN 2 0 111 =? ?? B?? R vmgmN 2 222 =+ ? N1=N2 ?? 0)5()( 21 2 0 21 =++? gmmR vmm ?? 8??????????????????????????? ??????????????????????? R????? m????????????????????????????? ???????????????????????????? ???? 5 mg?g????????????????????? ?????? h?????? ????????????????? v????????? ? mgh?2mgR? 12 mv2 ? ???????????? mg?????? N????????????????? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com http://tbzy.k12.com.cn K12??????/????????/????/??? mg?N?m 2vR ? ?????????????N?0 ? ??????v? gR ? ??????h?2.5R ? ??????N?5mg??????v? 6Rg ? ??????h?5R ? h???????2.5R?h?5R ?? 9???????????????????????? q????m??????? ????????????????? A??????????? ????? R??????????? B????????? A? ?? h??????? ???5R/2 ?????? 1?????????????????????????????????? B ? A????????? ?? B????????? C????????? ??D??????????? 2. ???????????? 10m/s??????????? 4 3 ??????????? ?????????????????? B ? A.15m/s B.20m/s C.25m/s D.30m/s 3???L???????????m???,???????????????????? ??? ?????? v 0 ??????????????????????????????? ?????? D ? A. ??????????? B. ???????????????m L v 20 C. ?????????????mg D. ???????????? gL 4???? L=0.50m?????OA?A??????m=3.0kg???????????? O???????????????????????????? 2.0m/s??g=10m/s 2 ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com O m p ? 4 ? 2 ? 1 1 http://tbzy.k12.com.cn K12??????/????????/????/??? ??????OA??? B ? A. 6.0N??? B. 6.0N??? C.24N??? D. 24N??? 5???????? L????????? O?????????.??? ????? O???????? A???????????????? ??? O???????????????????????????? ???? A????????????????C? A. gL7 B. gL5 C. gL3 D. gL2 6???????????L????????????????????? ????????????????????????????????? A ? A. gL B. 2 gL C. gL2 D. 2 gL E. 0 7????????????? O??????????? m?????? 4-2-11??? ??????????????????????????????? P???? ????? ? BD ? A.????????????? B.????????????????mg C.????????????????????????? D.????????????????????????? 8????m?????????????????????????????????? ???? v????? 2v?????????????????? C ? A.0 B.mg C.3mg D.5mg 9???????? m=0.1kg????????????????????? r=0.2m?????????????????? v1=2m/s?g? 10m/s2???? ?1?????????????? T1=? ?2?????????????? T2=? ????1?T?3N ?2?T?7N ? 10??? 4-2-17?????? L???????????m????????? ???????????????????????????? ???????A???? vA???????????m??????? ???????A?????????? F???????????????? ??m=0.5kg?L=0.5m?vA=0.4m/s?????? A???? B?????? m ????????????????? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com v1 o http://tbzy.k12.com.cn K12??????/????????/????/??? ????????? m?????????????????????????? mg???????????? L mvmg 2 A = ?? LgvA = ???? m???? A???? F??????????????????? L/mvmgF 21=+ ?? Lgm FLgLv >+=1 ??? m???? A???? F?????????? ????????? L mvFmg 2 2 =? ?? Lgm FLLgv <?=2 ?? LgvA = ????? m???? F???????????????? ??? L=0.5m?????? smsmLgv /2.2/105.0 =?==? ?vsmvA <= /4.0 ???????? FA?? L mvFmg 2 A A =? ???? NL mvmgF AA 84.45.0 4.05.0105.0 22 =??? ? ??? ? ? ??=?= ? A? B?????????????? B????????????? 22 2 122 1 BA mvLmgmv =?+ ?? smsmgLgLvv AB /5.4/5.01044.044.04 222 =??+=+=+= ???? B??? m??? FB?? L mvmgF BB 2 =? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com http://tbzy.k12.com.cn K12??????/????????/????/??? ?? NNL mvmgF BB 3.255.0 5.45.0105.0 22 = ? +?=+= 11??? 11????? R=0.40m???????????????? ??????????????????? A???? m=0.10kg?? ?????? v0=7.0m/s???????????? a=3.0m/s2??? ???????? 4.0m???????????????? C??? A?C??????????? g=10m/s2?? ???1.2m 12???5?11??????m=100g?????????h=2.0m?????????? ?????????????? r=0.4m????? ???????? ????? A??????????????????????A? ??????????????(g=10m/s 2 ) ???1J 13??????????????????????? A??????? B??????? ??????????????????????????? C??????????? ????????? A?????? AB??????????. ?????????? R??? C?? mg=m R vC 2 ? ?? C??????????? 2R?gt2?2 ? vCt?sAB ? ? B? C??? mvC2/2+2mgR?mvB2/2 ? ? A? B????? vB2?2asAB ? ???????????? a=5g?4 ?????? 1? ???? L???????????m????????????????????? ????????1?????????????????????????????2? ?????????????????????????????????????? ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com A B C v0 R ? 11 rh http://tbzy.k12.com.cn K12??????/????????/????/??? ????1? gL ?2? gLV ?? gLV ?? 2??????????????????????????????????????? ????????????????????????????? 65kg??????? ?????????????????????????????(g=10m/s 2 ) ???5mg 3?????????????? 1/4?????????? R?OB???????? A? ????? H????m???? A???????????????? C?????? ?????? (1)????????? B???????????? (2)????? C? B????? s???? ???(1)??? A?B??????????????? mgR? 22 1 Bmv ? gRvB 2= ? ??? B???????????? R vmmgF BN 2 =? ? mgR vmmgF BN 3 2 =+= ???????????????????????????????? 3mg (2)??? B?C??? ??????s=vB?t ? ?????? 22 1 gtRH =? ? ????? RRHs )(2 ?= ?????????? http://tbzy.k12.com.cn/ChosenRes/app/list/index.php?act=list&dest=col-71 ???????? Email:zhaohaib@163.com
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