大学物理双语试卷A.doc

广东工业大学考试试卷 ( A )课程名称: 大学物理一（双语） 考试时间: 第21周星期三 ( 7月12日)题号一二三四五六七八九十总分得分评分人1. Multiple Choices(选择题，每个题目3分，共30分。只有一个正确答案。)1）centripetal 向心的2) rim 轮子3) stretch 拉长，拉紧学 院： 专 业： 学 号： 姓 名： 装 订 线 4) transverse wave 横波， respectively 分别的5) in phase 同相； constructive interference 相干相长6) increase 增加7) incident 入射；destructive interference相干相消8) diffraction grating 衍射光栅9) relativistic effect相对论效应10) electron 电子2. Complete Blanks.(填空题，每个题目3分，共30分。)1). An electron travels with a velocity of 0.99c along a drift tube that is 10m long. The transit time as measured by an observer who is stationary with respect to the drift tube t is _, and by an observer who moves with the electron t0 is _.2）The Brewster angle for producing a plane polarized beam of light by reflection in air from a crown glass surface is 56.7。, the refraction angle is _.3）The figure shows an overhead view (俯视) of a ball with mass m boundcing from a vertical wall without any change in its speed v . Consider the change in the balls linear momentum, _, the direction of is _. yx4) The position of a particular particle as a function of time is given by . The particles acceleration as a function of time is _.5) w1w 2A man stands on a freely rotating platform. With his arms extended, his rotation frequency is 0.25rev/s. But when he draws in, his frequency is 0.80rev/s. The ratio of his moment of inertia in the first case to that in the second () is _.6) The equation of a loudspeaker vibrates in SHM is , the maximum velocity is _ , and the maximum acceleration is _.7) If 344 bright fringes are counted when the movable mirror moves 0.125mm, the wavelength of the light entering a Michelson interferometer (干涉仪) is _nm.3. Solving Problems. (计算题，每题10分，共40分)1). An Atwoods machine （阿基伍德机） consists of two masses, m1 and m2, which are connected by a massless inelastic （非弹性的） cord that passes over a pulley. If the pulley has radius R and moment of inertia I about it axle. a) Draw free-body diagrams for each of the two blocks and the pulley. b) Determine the acceleration of the masses m1 and m2, c) Compare to the situation in which the moment of inertia of the pulley is ignored. 2）Unpolarized light falls on two polarizer sheets whose axes are at right angles. (a) What fraction of the incident light intensity is transmitted? (What is I1 and I2? ) (b) What fraction is transmitted if a third polarizer is placed between the first two so that its axis makes a 60。angle the axis of the first polarizer? (c) What if the third polarizer is in front of the other two?3) The force required to compress an imperfect horizontal spring an amount x is given by F=150x+12x3, where x is in meters and F in Newtons. If the spring is compress 2.0m, a) what was the work required to compress the spring? b)what speed will it give to a 3.0-kg ball held against it and the