Chapter 10 11 Rotational Motion About Fixed Axis Torque, Rotational Inertia and Law Work and Rotational Kinetic Energy Angular Momentum and Conservation of Angular Momentum

Chapter 10 11 Rotational Motion About Fixed Axis Rigid Body Rotational Inertia Work and Rotational Kinetic Energy Angular Momentum and Conservation of Angular Momentum

0.25 zero(O, naught) point two five plus,positive

Introduction Some questions you concern: 1 Why should we study English? 2 Why we study physics in English? 3 How about the achievement in final exam? 4 Is it helpful for your future career to study physics in English?

§4-1 质点动量定理 §4-2 质点系动量定理 §4-3 质点系动量守恒定律

§12-7 能量均分定理

一、机械振动 物体围绕一固定位置往复运动. 二、其运动形式有直线、平面和空间振动

线性回复力是保守力，作简谐运动的系统机械能守恒

一、波动是振动的传播过程. 二、振动是激发波动的波源

现象： 若将一软绳（弹性媒质）划分为多个小单元（体积元）在波动中，各体积元产生不同程度的 弹性形变