物理复习材料（Physics review material）.docVIP

物理复习材料（Physics review material） Chapter 1 mechanical energy 1., when an object can do work, the object has energy. 2. kinetic energy: the kinetic energy of an object due to motion. 3. the greater the speed of the moving object, the greater the mass, the greater the kinetic energy. The 4. potential energy is divided into gravitational potential energy and elastic potential energy. 5. gravitational potential energy: the energy of an object due to its height. The greater the mass of the 6. object, the higher the lift, the greater the gravitational potential energy. 7. elastic potential energy: the elastic energy of an object due to an elastic deformation. The greater the elastic deformation of a body of 8., the greater its potential energy of elasticity. 9. mechanical energy: kinetic energy and potential energy collectively. The mechanical energy = kinetic energy + potential energy unit is: Joule 10., kinetic energy and potential energy can be transformed into each other. Methods include kinetic energy, gravitational potential energy, and kinetic energy, elastic potential energy. 11.. The mechanical energy available to humans in great quantities is wind energy and water power. The second chapter, elementary knowledge of molecular kinetic theory The content of the theory of 1. molecular motion is: (1) matter consists of molecules; (2) the molecules of all objects do regular motion without stopping. (3) the gravitational force and repulsion between molecules. 2. diffusion: different substances come into contact with each other and enter each others phenomena. 3. when a solid or liquid is compressed, the repulsion between molecules is greater than that of gravity. Solids are difficult to elongate and are molecules that exhibit gravity more than repulsion. 4. internal energy: the sum of kinetic energy and molecular potential energy that all molecules in an object do irregular motion is called internal energy. (internal energy is also called heat energy) 5., the internal en