力和弹力练习题

7.1、7.2力和弹力习题1、如右图所示， 弹簧测力计的示数为 N。2、某一弹簧测力计在使用前，指针指在0.3N的刻度上，某同学没有校零，就用该弹簧测力计测一个4N的力，测得的结果为_N。3、如下左图中体温计的示数是 _如下右图中弹簧测力计的分度值是_ 4、力的大小、方向和 _称为力的三要素。5、力的三要素包括力的_、_、_，它们能影响力的_.力是物体对物体的作用，离开物体就没有力. 6、甲、乙两个同学沿相反的方向拉测力计，各用力200牛.则测力计的示数为( ）A、100牛B、200牛C、0牛D、400牛7、关于弹簧测力计，下列说法正确的是( )A在月球上，不能用弹簧测力计测出力的大小B弹簧测力计上的字母“N”用来表示它的型号C测量时，要尽量让弹簧与外壳间没有摩擦D用时，弹簧测力计必须竖直放置9、使用弹簧测力计时，下面几种说法中错误的是( )A弹簧测力计必须竖直放置，不得倾斜B使用前必须检查指针是否指在零点上C使用中，弹簧、指针、挂钩不能与外壳摩擦D使用时，必须注意所测的力不能超过弹簧测力计的测量范围10、下列关于弹力的说法中，正确的是 ( ) A相互接触的物体之间一定存在弹力作用B只有受弹簧作用的物体才受到弹力作用C只有相互接触并发生形变的物体间才存在弹力作用D弹簧的弹力总是跟弹簧的长度成正比 11、关于弹力，下列说法错误的是： ( ) A相互接触的物体间不一定产生弹力;B弹力仅仅是指弹簧形变时对其他物体的作用;C弹力是指发生弹性形变的物体，由于要恢复原状，对接触它的物体产生的力;D压力、支持力、拉力都属于弹力.12、力的作用都是相互的，下列现象中没有利用这一原理的是( ) A.向前划船时，要用桨向后拨水 B.人向前跑步时，要向后下方蹬地 c.火箭起飞时，要向下方喷气 D.头球攻门时，要向球门方向用力顶球 13、下列说法中错误的是( )A.踢球时，摩擦阻力使地上滚动的球越来越慢B.投球时，手的推力使篮球在空中继续飞行C.顶球时，头顶球的力改变了球的运动方向D.接球时，手对球的力使球由运动变为静止x k b 1.c o m14、（选做）关于力的作用效果，下列说法中正确的是( )A 力是维持物体运动的原因。B 力是产生物体运动的原因。Xk b1.C 力一定能使物体的运动状态改变。D 力是物体发生形变的原因。 15、下列力中，最接近1牛顿的是( )A运动员举起杠铃的力;B拿起一个大西红柿的力; w C人扛起一袋大米的力;D一只蚂蚁对地的压力.16、（1）如图11（b）所示弹簧测力计的量程是_N，它的1大格表示_N，每1小格表示_N。经过调零后测量，从图中指针的位置可知它受到向下的拉力是_N。（2）使用弹簧测力计前，应先检查指针是否指在_刻线位置。若不在此处，应请老师调节后再使用。（3）弹簧测力计上最大刻度值就是弹簧测力计的_，用弹簧测力计所测量的力的大小_（填“可以”或“不可以”）超过这个值。17、小李在课外探究弹簧的长度跟外力的变化关系，利用如图的实验装置记录了相应实验数据如下： （1）这项研究在实际中的应用是 ；（2）分析实验数据你可得到的结论；（3）该弹簧原长是cm，若用该弹簧制作一只弹簧测力计，其量程为N。（4）小李作出了下图5所示的三个图像，其中正确的是_（填序号）本专业培养掌握生物技术及其产业化的科学原理、工艺技术过程和工程设计等基础理论、基本技能，能在生物工程和生物技术领域从事设计、生产、管理和新技术研究、新产品开发的工程技术人才。I signed with the Bank of the qilu Bank loan contract (contract) conventions, and I use scheme, I would request the loans (in words) until I opened personal settlement account with your Bank (account), uses loan for 。 Loan operation, business unit name: account number: loan funds from these personal settlement account into the account of a payment. Loans in accordance with the following payment methods to pay. One, lender trustee payment. Delegate qilu Bank loan funds of the borrower to meet the stipulation of the contract the following borrowers, counterparties, commitment funds, regulatory compliance, legal, and willing to take the pay disputes, loss and other consequences of the delegate. Payee account number Bank name amount purpose II, borrowers own payment methods. Qilu Bank according to the borrowers withdrawal request to loan funds disbursed directly to the borrowers account, and independently by the borrower payments to borrowers who meet the stipulation of the contract transactions. I guarantee to your bank contracts and other prove of material submitted by real and effective. When in accordance with one payment, I agree with the above account with your bank loan funds that are not used for stop payment management,stop paid confirmed book records table single 13: lifted check pay notice records table single 14: personal loan ahead of repayment application accepted table Records table single 15: loan lines opened/cancellation application approval table records table single 16: qilu card award letter self loan lines cancellation application approval table records table single 17: loan lines cancellation application approval table records table single 18: qilu Bank loan urged received notice records table single 19: arrived (quality) bet real right proved out library listing records table single 20: housing mortgage right cancellation proved records table single 21: personal pledge loan repayment commitment letter 11. schedule Spontaneous date of promulgation of this practice, this procedure is issued prior to the implementation of the relevant provisions are inconsistent with this regulation, is subject to this regulation. The risk management Department is responsible for the interpretation and amendment of procedures by the head office. Break through the restrictions imposed by this practice, should submit file explanations authorities file explanation deemed necessary and submitted to the Head Office of the loan Review Committee for approval. Record form 1: personal loan customer conversation transcript to me given the loan applicant bank personal loan applications, according to qilu Bank personal loan interviews regulations and interviews on the following issues with the borrower and the guarantor, please respond, and ensure content authenticity. 1, your personal loan application materials must be submitted to the qilu Bank is true, otherwise you should bear the corresponding legal responsib