美国大学物理题 求救命啊Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various va

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 01:10:35
美国大学物理题 求救命啊Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various va

美国大学物理题 求救命啊Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various va
美国大学物理题 求救命啊
Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various values of K+Ug.Suppose that K+Ug of the system is A.Find all of the true statements below.
1.The potential energy of the system decreases as the planet moves from r1 to r2.2.The potential energy of the system increases as the planet moves from r1 to r2.
3.When the separation between the two bodies is r2,the kinetic energy of the system is A-­‐B.
4.The system is a bound system; the planet can never escape.5.The path traced by this orbiting system is a circle.
6.When the separation between the two bodies is r1,the kinetic energy of the system is B-­‐C.
A) 2,3,4
B) 1,3,4
C) 2,4,5
D) 1,4,5
E) 2,4,6

美国大学物理题 求救命啊Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various va
A
1) 错,r1到r2过程中,纵坐标增高,说明总能量加大.
2) 对
3) 对,总机械能为A,所以当行星处于r2时,动能为总机械能A-B处的势能
4)对,这条曲线过了A点还在增高,说明行星往更高的轨道运行需要更多的能量,因而是为边界的,不能逃逸
5)错,半径可以变,不一定是个圆
6)错,参考3,应该为A-C

美国大学物理题 求救命啊Problem 7.The figure below is a graph of the energy of a system of a planet interacting with a star.The gravitational potential energy Ug is shown as the thick curve,and plotted along the vertical axis are various va 美国大学物理题 救命啊Problem 5.A car is about to make a turn at v=3m/s such that the radius of the kissing circle at the turn is 10m.What should the minimum coefficient of friction be so that the car does not slip on the road?A) 0.09B) 0.04 大学物理题.求解答 大学物理题 求过程 大学物理题.求大神. 大学物理题,求过程 大学物理题 求详解 一道大学物理题,求讲解 求解答大学物理题18.10, 求方法,救命啊 已知25^m乘2乘10^n=5^7乘2^4,求m,n的值!救命啊--救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊---救命啊--- 求大神救命!大学高数期末试题解答 有没有会做高中物理题目的啊啊~救命啊. 这道大学物理题求大神解答 求大学物理题解释第三题 大学物理题求解答(高中水平) 大学无机化学练习题 救命啊求大神帮我做下面几个题 我悬赏就这么多了T T ,求解答救命救命救命速度