In this lecture, we will revisit the principle of work and energy introduced in lecture D7 for particle dynamics, and extend it to 2D rigid body dynamics. Kinetic Energy for a 2D Rigid Body We start by recalling the kinetic energy expression for a system of particles derived in lecture D17

In lecture D2 we introduced the position velocity and acceleration vectors and referred them to a fixed cartesian coordinate system. While it is clear that the choice of coordinate system does not affect the final answer, we shall see that, in practical problems, the choice of a specific system may simplify the calculations considerably. In previous lectures, all the vectors at all points in the trajectory were expressed in the

人教A版高中数学必修5第三章 不等式3.1 不等关系与不等式导学案(2)

Let vs=100 cos a t V in the circuit shown in Fig. 9-12.(a) Find the equivalent parallel RLC circuit and then determine resonant frequency @r, Q, and v(t).(b) Find i, (t),i2(t), and i3(t) (c)Calculate the average power loss in the 10 kQ2 resistor and the maximum energy stored in the inductor

Ax=b有x=A-1b,但实际上并不显式求A-1 例子: 7x=21 X=21/7=3 如果求逆 x=7-1×21=.142857×21=2.99997 这就需要一次除和一次乘,且精度更低

一、单项选择题(本大题共10小题,每小题2分,共20分) 在每小题列出的四个备选项中只有一个是符合题目要求的,请将其代码填写在题后的括号内。错选、多选或未选均无分。 1.对任意n阶方阵A、B总有() A.AB-BA

The Academy of management Review, Vol 6, No 4(Oct. 1981), 609-620 Stable url: http://links.jstor.org/sici?sici=0363-7425%28198110%296%03a4%3c609%03atcoiot%3e2.0.c0%3b2-m The Academy of Management Review is currently published by Academy of Management. Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at

Two stimulating and innovative papers by Morrill were concerned with waves of spatial diffusion.(Morrill,[1, 2 )The purpose of the first was to propose some insights and interpretations which can be obtained by characteriz ive-like phend Morrill scopic and theoretical implications of such a conceptualization. He was concerned with both time and distance, and noted that in earlier conceptualizations more emphasis had been placed on de ecay re elated to time than on that related to distance. He therefore hypothesized that the number of innovations would de-

线性变换 x’=a1x+b1y, y’=a2x+b2y. 画出由平面直线段或曲线 段组成的图形C及其象C’。 观察：直线、平行、垂直、 长度、角度、圆→ ?

1、机械消耗定额以一台机械工作8小时工作班为计量单位。 -机械连续工作24小时为3个台班停置24小时为停置1个台班 2、定额制定方法 机械一次循环正常延续时间A=循环组成部分正常延续时间之和机械纯工作1小时循环次数B=3600(60)/A