机械能守恒定律的应用（The application of conservation law of mechanical energy）.docVIP

下载本文档

4
0
约6.96千字
约 7页
2017-07-24 发布于河南
举报
版权申诉

机械能守恒定律的应用（The application of conservation law of mechanical energy）.doc

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

机械能守恒定律的应用（The application of conservation law of mechanical energy）

机械能守恒定律的应用（The application of conservation law of mechanical energy） First, the multiple-choice question 1, a mass of 24kg slider, with the initial speed of 4m/s in the smooth horizontal plane to the left of the slide, from a moment on the slider on the right of water Flat force, after a period of time, the speed of the slider to the right direction, the size of 4m/s, then in this time, the horizontal force to do the work: () (A) 0; (B) 8 J; (C) 16 J; (D) 32 J; 2. One person kicks the ball with a mass of 1kg to make the ball fly at a speed of 10m/s at rest. Suppose that the average kick force is equal to that of the ball 200N, the ball moves in the horizontal direction, and the 20m stops. What man does to the ball is: () (A) 200 J; (B) 50 J; (C) 4000 J; (D) cannot be determined 3. A mass of 1kg is raised by the hand from the rest to the 1m, when the speed of the object is 2m/s, and the following statement is wrong (g take 10m/s2): () (A) the work of the hand to the object is 12 J; (B) to work 12 J with the external force; (C) work with an external force on an object 2 J; (D) an object that overcomes gravity by 10 J 4, at the same height, the three ball of the same quality as A, B, C were up equal to the rate of vertical, vertical down to throwing the peace, they At the same level on the ground, the three balls in the course of movement, the work done to them by gravity is WA, WB, WC, the average power of gravity points Dont be PA, PB, PC, then their size is: () (A) WA WB = WC, PA PB = PC; (B) WA = WB = WC, PA = PB = PC; (C) WA = WB = WC, PB PC PA; (D) WB WC WA, PB PC PA 5, an object falls freely from the height of H, and the time of its fall is t. In the statement of gravity, work and power, the correct thing is: () (A) the gravity work done within the previous t/2 time is less than that in the t/2 time (B) the average power of the work done by gravity in the first t/2 time of the fall is less than that in the post t/2 time (C) the displacement of the front