All around us: wheels, skaters, ballet, gymnasts, helicopter, rotors, mobile engines, CD disks, … Atomic world: electrons— “spin”, “orbit”. Universe: planets spin and orbiting the sun, galaxies spin, …

The causes of acceleration of a system--The first law of motion states that zero total force exists when the system has a constant velocity; a nonzero total force on the system causes its acceleration

The gravitational force 2. Newtons law of universal gravitation

Chapter 13 temperature, heat transfer, and first law of thermodynamics Thermodynamics study the thermal energy (often 10\ -Universe just after beginning called the internal energy) of systems

1. The position vector and displacement Let the plane of the two-dimensional motion be the x-y plane of a Cartesian coordinate system

1. The discovery of electrification OThe phenomenon of electrification Glass rod is rubbed with silk-positive Amber rod is rubbed with fur--negative

Electric Fields 918.1 Conductors in electric field 1. Conductors A conductor is a material in which the electrons at the outer periphery of an atom have no great affinity for any particular individual

Electrical Potential Ener and Electric Potentia 17.1 Electrical potential energy and electric potential 1. Electric force is conservative force Coulomb's force:

西南交通大学：《大学物理》课程教学资源（PPT课件讲稿，上册）第二篇 实物的运动规律 第三章 运动的描述 §3.3 运动的描述（续）§3.4 运动学的两类基本问题（习题课）

I．Choose the Correct Answer 1. An object is moving in a circle at constant speed v. The magnitude of the rate of change of momentum of the object （ C ）