《2010双语力学试题A卷及答案(定稿).doc》由会员分享，可在线阅读，更多相关《2010双语力学试题A卷及答案(定稿).doc（10页珍藏版）》请在金锄头文库上搜索。
1、长江大学试卷 学院 班级 学号 姓名 .密封.线.20102011 学年 第一学期力学(双语)课程考试试卷(A卷)专业：物理学 年级：09级 考试方式: 闭卷 学分:4.5 考试时间：120 分钟题号一二三四五六总分得分阅卷人得分. Filling the Blanks (2 10=20 marks)1. A system has an acceleration . One of the forces acting on the system is. Is this the total force on the system? . If not, the other force acting
2、on the system is 2. The parallel axis theorem is 3. The Newtons law of Gravitation is 4. Body1 and body2 are in completely inelastic one-dimensional collision. If their initial momenta are respectively, their final momenta is Figure 15. Two masses, and (), hang over an ideal pulley and the system is
3、 free to move (see Figure 1). Such an arrangement is called an Atwoods machine. The magnitude of the acceleration of the system of two masses is .The magnitude of the tension in the cord is 6. If a man moves, with a speed equal to 0.5 that of sound, away from a stationary organ(风琴) producing a sound
4、 of frequency f, he will probably hear a sound of frequency 7. If the angular momentum of the system remains constant, the net external torque acting on a system is 8. The distance between the adjacent two nodes is 阅卷人得分 Choose the Correct Answer (310=30 marks)1. A 0.20kg puck slides across a fricti
5、onless floor with a speed of 10 m/s. The net work done on the puck is ( )A-20J B -10J C 0J D20J 2. Two objects A and B, as shown in Fig.2, both with mass are placed inside an elevator whose acceleration is , the masses of the rope and the pulley are negligible. If the frictional forces of the pulley
6、 axis and the table are also negligible, and the resistance of the air can be neglected, the tension in the rope is ( )Figure 2A B C D3. The magnitude of the force of gravity between two identical objects is given by. If the mass of each object is doubled but the distance between them is halved, the
7、n the new force of gravity between the objects will be ( )A 16 B 4 C D 84. A point mass m is undergoing uniform circular motion with an angular frequency in a horizontal circle of radius r. Which of the following is a representation of the angular momentum of the mass? ( )长江大学试卷 学院 班级 学号 姓名 .密封.线.A.
8、 B. C. D. 5. When a mass point is in a circular motion then ( )A The tangential acceleration definitely change, the normal acceleration also change.B The tangential acceleration may not change, the normal acceleration definitely change. C The tangential acceleration may not change, the normal accele
9、ration does not change.D The tangential acceleration definitely change, the normal acceleration does not change.6. The expression of mechanical wave is , where the unit of y and x is meter and the unit of the t is second, then ( )A the wavelength is B the wave speed is C the period is D the wave tra
10、vels along the positive direction of x axisFigure 37. A standing wave as shown in figure3, the phase difference of the points a and b is ( )A B C D 0 Figure 48. An uniform thin rod OA is pivoted on a frictionless hinge at one end O, as shown in Fig4. The rod is held at rest horizontally and then rel
11、eased. When it reaches the vertical position which one is correct of following statements ( ) A Angular velocity varies from small to big, angular acceleration remains unchanged. B Both angular velocity and angular acceleration vary from small to big.C Angular velocity varies from small to big, whil
12、e angular acceleration varies from big to small. D Angular velocity remains unchanged, angular acceleration equals zero. 9Which of the following relationships between the force F on a particle and the particles position implies simple harmonic motion ( )A B C D10. Keplers second law of planetary motion is a consequence of the law of conservation of ( )A linear momentum B mechanical energy C kinetic energy D angular momentum 阅卷人得分.（10 marks）A bullet is fired along a horizontal direction with the velo
