祁东育英实验学校(补习班)《曲线运动、万有引力定律》单元检测试题(1)

祁东育英实验学校(补习班)《曲线运动、万有引力定律》单元检测试题(1) 祁东育英实验学校(补习班)《曲线运动、万有引力定律》单元检测试题 一.选择题(共60分。全对得4分，只对部分得计2分，有错或不选得0分) 2011-9-20 1.甲、乙为两颗地球卫星，其中甲为地球同步卫星，乙的运行高度低于甲的运行高度，两卫星轨道均可视为圆轨道。以下判断正确的是( ) A.甲的周期大于乙的周期 B.乙的速度大于第一宇宙速度 C.甲的加速度小于乙的加速度 D.甲在运行时能经过北极的正上方 2.一行星绕恒星作圆周运动。由天文观测可得，其运动周期为T，速度为v，引力常量为G，则( ) 3234,vvT A(恒星的质量为 B(行星的质量为 2GT2,G 2,vvT C(行星运动的轨道半径为 D(行星运动的加速度为 2,T3.民族运动会上有一个骑射项目，运动员骑在奔驰的马背上，弯弓放箭射击侧向的固定目标(若运动员骑马奔驰的速度为v，运动员静止时射出的弓箭的速度为v，直线跑道离固定12目标的最近距离为d，要想在最短的时间内射中目标，则运动员放箭处离目标的距离应该为 22dvv，dvdvdv21122 A( B( C( D( 22vvv2vv,2121 如图所示，一个小球(视为质点)从=12m高处，由静止开始4. H 通过光滑弧形轨道AB，进入半径R=4m的竖直圆环，圆环轨道部分 的动摩擦因数处处相等，当到达环顶C时，刚好对轨道压力为零; 沿CB滑下后，进入光滑弧形轨道BD，且到达高度为h的D点时速 2度为零，则h之值可能为(g=10m/s) ( ) A(8m B(9m C(10m D(11m 5.如图5所示的塔吊臂上有一可以沿水平方向运动的小车A，小车下装有吊着物体B的吊钩。在小车A与物体B以相同的水平速度沿吊臂方向匀速运动的同时，吊钩将物体B向上吊起，A、2B之间的距离以h=H - 2t规律变化，则物体做( ) A(速度大小不变的曲线运动( B(速度大小增加的曲线运动( C(加速度大小方向均不变的曲线运动( D(加速度大小方向均变化的曲线运动 6.如图所示,甲乙两球做匀速圆周运动,向心加速度a随半 径R变化.由图象可以知道( ) A.甲球运动时,线速度大小保持不变 B.甲球运动时,角速度大小保持不变 C.乙球运动时,线速度的大小保持不变 D.乙球运动时,角速度大小增大 7.甲、乙两球位于同一坚直线上的不同位置,甲比乙高出h,将甲、乙两球以速度v、v沿同12一水平方向抛出,不计空气阻力,下列条件中可能使乙球击中甲球的是 ( ) A.同时抛出,且v < v B.甲迟抛出,且v > v 1212 C.甲早抛出,且v > v D.甲早抛出,且v < v1212 loan management (post) review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the contract, payment; 4, no other major cases against loan security;、Reviewed by: date of record form 9: qilu bank borrowing by single years of maximum amount a maximum no-loan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum number of years in the loan contract are the top line opened, the borrowed and requested your bank opened credit lines above, is hereby requested. Borrower signature: date agreed to open credit lines. Customer Manager signature: date agreed to open credit lines. Loan review signature: date line cancellation-I did not use the loan amount, your bank credit lines to be cancelled. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-unused credit lines, agree to write off loans. -Credit loan principal repayment, agree to write off loans. Customer Manager signature: date case, agree to write off loans. Loan review signature: date of record form 16: qilu self credit for credit card cancellation application form name of borrower ID number and credit limit expiration date year month day to year month day year contract number self-service card-I do not use credit, your bank credit lines to be cancelled. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-unused credit lines, agree to write off loans. -Credit loan principal repayment, agree to write off loans. Customer Manager signature: 8.等质量的小球A、B用一不可伸长的轻细绳相连,A、B可看作质点,如图所示,开始时细绳水平伸直,A、B静止.由静止释放B后,已知当 细绳与竖直方向的夹角为60?时,滑块B沿着竖直杆下滑的速度为 v,则连接A、B的绳长为(不及小球与杆的摩擦)( ) 2222vv433vv4A. B. C. D. g4gg3g 9.如图所示,用线悬挂的圆环链由直径为5 cm的圆环连接而成,枪管水平放置,枪管跟 环5在同一水平面上,且两者相距100 m,子弹初速度为1 000 m/s.若在开枪的同时 烧断悬线,子弹应穿过第几个环 ( ) A.5 B.4 C.3 D.2 10. 2009年5月，航天飞机在完成对哈勃空间望远镜的维修任务后，在A点从圆形轨道?进入椭圆轨道?，B为轨道?上的一点，如图所示，关于航天飞机的运动，下列说法中正确的有 (A)在轨道?上经过A的速度小于经过B的速度 (B)在轨道?上经过A的动能小于在轨道?上经过A 的动能 (C)在轨道?上运动的周期小于在轨道?上运动的周期 (D)在轨道?上经过A的加速度小于在轨道?上经过A的加速度 11.质量为m的探月航天器在接近月球 表 关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf 面的轨道上飞行，其运动视 为匀速圆周运动。已知月球质量为M，月球半径为R，月球表面重力 加速度为g，引力常量为G，不考虑月球自转的影响，则航天器的( ) GMv,A(线速度 B(角速度 ,,gRR GMR C(运行周期 D(向心加速度T,2,a,2gR 12.图示为某一皮带传动装置。主动轮的半径为r,从动轮的半1 径为r。已知主动轮做顺时针转动，转速为n，转动过程中皮2 带不打滑。下列说法正确的是:( ) A(从动轮做顺时针转动 B(从动轮做逆时针转动 rr12C(从动轮的转速为n D(从动轮的转速为n rr21 滑水平桌面上,一小球以速度v向右匀速运动,它经过靠近桌边的竖直木板13.如图所示,光 ad边前方时,木板开始做自由落体运动.若木板开始运动时,cd边与桌面相齐,则小球在木板上的投影轨迹是 ( ) -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-ed. I did not use the loan amount, your bank credit lines to be cancell-pen credit lines. Loan review signature: date line cancellationve, is hereby requested. Borrower signature: date agreed to open credit lines. Customer Manager signature: date agreed to oer of years in the loan contract are the top line opened, the borrowed and requested your bank opened credit lines aboloan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum numb-a maximum noReviewed by: date of record form 9: qilu bank borrowing by single years of maximum amount 、other major cases against loan security;review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the contract, payment; 4, no loan management (post) 2to write off loans. Customer Manager signature: Credit loan principal repayment, agree-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I do not use credit, your bank credit lines to be cancelled. -ce cardservi-n form name of borrower ID number and credit limit expiration date year month day to year month day year contract number selfe to write off loans. Loan review signature: date of record form 16: qilu self credit for credit card cancellation applicatioCredit loan principal repayment, agree to write off loans. Customer Manager signature: date case, agre-unused credit lines, agree to write off loans. 14.甲、乙两名溜冰运动员,面对面拉着弹簧秤做圆周运动的溜冰 表演,如图所示.已知M=80 kg,M=40 kg,两人相距0.9 m,弹簧秤甲乙 的示数为96 N,下列判断正确的是 ( ) A.两人的线速相同,约为40 m/s B.两人的角速相同,约为2 rad/s C.两人的运动半径相同,都中0.45 m b D.两人的运动半径不同,甲为0.3 m,乙为0.6 m D C 15.如图所示，一根不可伸长的轻绳两端各系一个小球a和b，跨在 两根固定在同一高度的光滑水平细杆C和D上，质量为m的a球置a 于地面上，质量为m的b球从水平位置静止释放。当b球摆过的角b 度为90?时，a球对地面压力刚好为零，下列结论正确的是 ( ) a A( B( mm:3:1,mm:1:1,abab C(若只将细杆D水平向左移动少许，则当b球摆过的角度为小于90?的某值时，a球对地面的压力刚好为零 D(若只将细杆D水平向左移动少许，则当b球摆过的角度仍为90?时，a球对地面的压力刚好为零 题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 二(计算题(4个小题共计50分) h,0.9mx,6.4m16.(10分)如图为一网球场长度示意图，球网高为，发球线离网的距离为， H,1.25m某一运动员在一次击球时，击球点刚好在发球线上方高处，设击球后瞬间球的速度大小为，方向水平且垂直于网，试通过计算说明网球能否过网,若过网，v,32m/s02试求网球的直接落地点离对方发球线的距离L,(不计空气阻力，重力加速度g取10m/s) v0 网 H x x h 发球发球 线线 17. (10分)在用高级沥青铺设的高速公路上，汽车的 设计 领导形象设计圆作业设计ao工艺污水处理厂设计附属工程施工组织设计清扫机器人结构设计 时速是108km/h。汽车在这种路面上行驶时，它的轮胎与地面的最大静摩擦力等于车重的0.6倍。 )如果汽车在这种高速路的水平弯道上拐弯，假设弯道的路面是水平的，其弯道的最 (1 小半径是多少, (2)如果高速路上设计了圆弧拱桥做立交桥，要使汽车能够以设计时速安全通过圆弧拱 2桥，这个圆弧拱桥的半径至少是多少,(取g=10m/s) -unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I did not use the loan amount, your bank credit lines to be cancelled. -ine cancellationdate lure: date agreed to open credit lines. Customer Manager signature: date agreed to open credit lines. Loan review signature: re the top line opened, the borrowed and requested your bank opened credit lines above, is hereby requested. Borrower signater of years in the loan contract aloan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum numb-ed by: date of record form 9: qilu bank borrowing by single years of maximum amount a maximum noReview、ntract, payment; 4, no other major cases against loan security;loan management (post) review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the co3Credit loan principal repayment, agree to write off loans. Customer Manager signature:-sed credit lines, agree to write off loans. unu-Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I do not use credit, your bank credit lines to be cancelled. -service card-mit expiration date year month day to year month day year contract number selfdit lire: date of record form 16: qilu self credit for credit card cancellation application form name of borrower ID number and creal repayment, agree to write off loans. Customer Manager signature: date case, agree to write off loans. Loan review signatuCredit loan princip 班次____学号_____姓名________得分_____________ ,18. (10分)如图10所示，斜面AB与竖直半圆轨道在B点圆滑相连，斜面倾角为=45?，半圆轨道的半径为R，一小球从斜面的顶点A由静止开始下滑，进入半圆轨道，最后落到斜面上，不计一切摩擦。试求:(结果可保留根号)。 (1)欲使小球能通过半圆轨道最高点C，落到斜面上，斜面AB的长度L至少为多大, (2)在上述最小L的条件下，小球从A点由静止开始运动，最后落到斜面上的落点与半圆轨道直径BC的距离x为多大, 图10 19. (10分)2007年10月24日，我国成功地发射了“嫦娥一号”探月卫星，其轨道示意图如图12所示.卫星进入地球轨道后还需要对卫星进行10次点火控制。第一次点火，抬高近地点，将近地点抬高到约600km，第二、三、四次点火，让卫星不断变轨加速，经过三次累积，卫星加速到11.0km/s的速度进入地月转移轨道向月球飞去.后6次点火的主要作用是修正飞行方向和被月球捕获时的紧急刹车,最终把卫星送入离月面200km高的工作轨道(可视为匀速圆周运动).已知地球质量是月球质量的81倍,R=1800km ,R=6400km,卫星质量2350kg ,月地2地球表面重力加速度g取10m/s . (涉及开方可估算，结果保留一位有效数字)求: ?卫星在绕地球轨道运行时离地面600km时的加速度。 ?卫星从离开地球轨道进入地月转Q 24 h轨48 h轨轨道? 16 h轨移轨道最终稳定在离月球表面道 道 道 200km的工作轨道上外力对它做了轨道Ш 轨道П 多少功?(忽略地球自转及月球绕地 球公转的影响) P 地月转移 轨道 图12 I do not use credit, your bank credit lines to be cancelled. -ce cardservi-n form name of borrower ID number and credit limit expiration date year month day to year month day year contract number selfe to write off loans. Loan review signature: date of record form 16: qilu self credit for credit card cancellation applicatioCredit loan principal repayment, agree to write off loans. Customer Manager signature: date case, agre-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-ed. I did not use the loan amount, your bank credit lines to be cancell-pen credit lines. Loan review signature: date line cancellationve, is hereby requested. Borrower signature: date agreed to open credit lines. Customer Manager signature: date agreed to oer of years in the loan contract are the top line opened, the borrowed and requested your bank opened credit lines aboloan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum numb-a maximum noReviewed by: date of record form 9: qilu bank borrowing by single years of maximum amount 、other major cases against loan security;review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the contract, payment; 4, no loan management (post) 4to write off loans. Customer Manager signature: Credit loan principal repayment, agree-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date- 祁东育英实验学校(补习班)《曲线运动、万有引力定律》单元检测题参考答案 1.AC 2.ACD 3.B 4.B 5.BC 6. A 7. D 8.D 9. A 10. ABC 11.ACD 12. BC 13.B 14.BD 15. AD x16.解析:网球在水平方向通过网所在处历时为 t,,0.2s1v0 12下落高度 hgt,,0.2m112 因，故网球可过网。 hHh,,,0.35m1 2H网球到落地时历时 t,,0.5sg 水平方向的距离 svt,,16m0 Lsx,,,23.2m所求距离为 17(【解析】(1)汽车在水平路面上拐弯，可视为汽车做匀速圆周运动，其向心力是车与路面间的静摩擦力提供，当静摩擦力达到最大值时，由向心力公式可知这时的半径最小，有 2vmF=0.6mg? 由速度v=30m/s，得弯道半径 r?150m; mr (2)汽车过拱桥，看作在竖直平面内做匀速圆周运动，到达最高点时，根据向心力公式 2vm,F= 有:mgNR 2vm为了保证安全，车对路面间的弹力F必须大于等于零。有 mg? NR 则R?90m。 【答案】(1) r?150m;(2)R?90m。 18【解析】(1)由题意:小球恰好通过最高点C时， 对轨道压力N=0，此时L最小。 2vcmgm, ？v,gRcR 从A到C机械能守恒， 12sin(2)mgL,,mgR，mv„ c2 52？L,R 2 12y,gt (2)落到斜面上时:x=vt c2 2R,ytan,, 解得: x,(5,1)Rx -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I do not use credit, your bank credit lines to be cancelled. -service card-mit expiration date year month day to year month day year contract number selfdit lire: date of record form 16: qilu self credit for credit card cancellation application form name of borrower ID number and creal repayment, agree to write off loans. Customer Manager signature: date case, agree to write off loans. Loan review signatuCredit loan princip-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I did not use the loan amount, your bank credit lines to be cancelled. -ine cancellationdate lure: date agreed to open credit lines. Customer Manager signature: date agreed to open credit lines. Loan review signature: re the top line opened, the borrowed and requested your bank opened credit lines above, is hereby requested. Borrower signater of years in the loan contract aloan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum numb-ed by: date of record form 9: qilu bank borrowing by single years of maximum amount a maximum noReview、ntract, payment; 4, no other major cases against loan security;loan management (post) review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the co5Credit loan principal repayment, agree to write off loans. Customer Manager signature:-sed credit lines, agree to write off loans. unu 52【答案】(1) (2) ？L,Rx,(5,1)R2 19【解析】?卫星在离地600km处对卫星加速度为a，由牛顿第二定律 GMmGMm2,ma 又由 可得a=8 m/s ,mg22R，，R，h1 (2)卫星离月面200km速度为v，由牛顿第二定律得: 2GMmmvGMm月,,mg„由 及M/M=1/81 月22Rr，，，h，，r，h22 2622得:V=2.53×10km/s 由动能定理,对卫星 1122W=mv—mv 022 1122112【答案】(1)8 m/s (2)W=mv—mv=1.55x10J 022 n form name of borrower ID number and credit limit expiration date year month day to year month day year contract number selfe to write off loans. Loan review signature: date of record form 16: qilu self credit for credit card cancellation applicatioCredit loan principal repayment, agree to write off loans. Customer Manager signature: date case, agre-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-ed. I did not use the loan amount, your bank credit lines to be cancell-pen credit lines. Loan review signature: date line cancellationve, is hereby requested. Borrower signature: date agreed to open credit lines. Customer Manager signature: date agreed to oer of years in the loan contract are the top line opened, the borrowed and requested your bank opened credit lines aboloan borrowers: borrowers: ... Borrower name number, line of credit expiry date year month day to year month day maximum numb-a maximum noReviewed by: date of record form 9: qilu bank borrowing by single years of maximum amount 、other major cases against loan security;review: 1, approval criteria have been implemented; 2, the contract is correct; 3, in line with the contract, payment; 4, no loan management (post) 6to write off loans. Customer Manager signature: Credit loan principal repayment, agree-unused credit lines, agree to write off loans. -Credit loan principal repayment, your bank credit lines to be cancelled. Borrower signature: date-I do not use credit, your bank credit lines to be cancelled. -ce cardservi-