高三物理直线运动测试题(有答案).doc

直线运动单元测试题一、选择题（共48分）1. 一个质点做方向不变的直线运动加速度的方向始终与速度方向相同，但加速度大小逐渐减小直至为零,在此过程中 A. 位移逐渐减小，当加速度减小到零吋，位移将不再减小B速度逐渐增大，当加速度减小到零时，速度达到最大值C.速度逐渐减小，当加速度减小到零时，速度达到最小值D.位移逐渐增大，当加速度减小到零时，位移将不再增大2.汽车甲沿着平直的公路以速度v0做匀速直线运动，当它路过某处的同时，该处有一辆汽车乙开始做初速度为零的匀加速运动去追赶甲车，根据上述的已知条件( )A可求出乙车追上甲车时乙车的速度B可求出乙车追上甲车时乙车所走的路程C可求出乙车从开始启动到追上甲车时所用的时间D不能求出上述三者中任何一个3.仅仅16岁零9个月15天，杭州女孩叶诗文的成就已“前无古人”.2012年12月16日凌晨，她以破赛会纪录的成绩勇夺短池世锦赛女子200米混合泳冠军，仅仅两年时间，她便成为中国游泳史上第一位集奥运会、世锦赛、短池世锦赛和亚运会冠军于一身的全满贯叶诗文夺得冠军说明她在这次比赛中下列的哪一个物理量比其他运动员的大( )A跳入泳池的速度 B终点撞线时的速度C全程的平均速率 D掉头的速度4. 做匀减速直线运动的物体经4s后停止，若在第1s内的位移是14m，则最后1s的位移是A3.5m B2mC1mD0 5如图所示的位移(x)时间(t)图象和速度(v)时间(t)图象中给出四条图线，甲、乙、丙、丁代表四辆车由同一地点向同一方向运动的情况，则下列说法正确的是 A甲车做直线运动，乙车做曲线运动B0t1时间内，甲车通过的路程大于乙车通过的路程C0t2时间内，丙、丁两车在t2时刻相距最远D0t2时间内，丙、丁两车的平均速度相等6.一个质点沿半径为R的圆周运动一周，回到出发点，在此过程中，路程和位移的大小出现的最大值分别是( )A2R,2R B0,2RC2R,2R D2R,2R7. 近年来有一种测g值的方法叫“对称自由下落法”：将真空长直管沿竖直方向放置，自其中O点向上抛小球又落至原处的时间为T2，在小球运动过程中经过比O点高H的P点，小球离开P点至又回到P点所用的时间为T1，测得T1 、T2和H，可求得g等于( )A B. C. D.8如图，甲、乙两物体分别从A、C两地由静止出发作加速运动，B为AC中点，两物体在AB段的加速度大小均为a1,在B、C段的加速度大小为a2，且a1 ，不符合题设故野兔应先加速后以匀速,设加速时间为，则有故 18(1)设经t1秒，汽车追上自行车，由题意得：v汽t1v自t1x，解得：t110 s.(2)汽车的加速度大小为a2 m/s2，设第二次相遇所用的时间为t2，则v自t2v汽t2at，解得：t212 s设汽车从刹车到停下用时t3秒，则：t39 st2，故自行车再次追上汽车前，汽车已停下从刹车到停下汽车的位移：x汽t3设经t4时间自行车追上汽车，则v自t4t3，解得：t413.5 s，再经过13.5 s两车第二次相遇在平时的测量工作中，他积极做好传、帮、带工作，热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟and actual case whether match; by is located land right nature; property status, whether has damage or quality problem; property using situation, rental or use; reference around similar property price, judge assessment value of rationality; whether exists property disputes, and seized, and freeze, and mortgage, and demolition, and transformation, limit situation. 2. to land right mortgage of, survey people should verified following information: land right card by contains Ming information (right people, and location, and nature, and term, and area,) and actual case whether match; land nature; land flat situation; ground buildings situation; reference around similar land price, judge assessment value of rationality; mortgage real whether has other mortgage right or notice registration established prior; whether exists property disputes, and seized, and freeze, and mortgage, limit situation. 3. other chattels, ownership, the value of the mortgage should be implemented, and whether factors such as easy handling. (C) pledge of collateral investigation procedures, investigators should enforce collateral value, convenience custody and disposition, pledge rights effective identification, registration, etc. (D) guarantee investigation to ensure that the procedures, the investigation shall, in accordance with the borrowers standards to investigate the guarantor evaluation assurance. 15th information audit survey people deal with borrowers and qualification provided by the guarantor, financial status, proof of identity, the authenticity of the data carefully reviewed, verified, rationality and effectiveness. Include: (a) the borrower data auditing 1. corporate clients should focus on assessing various types of licenses, certificates, financial reporting, powers of Attorney and other text and a real plea related information. 2. small business class customers also should focus on the review of the borrower to provide evidence of business, financial position and actual control of credit, property, and more