Title: Long and Short Range Forces: Gravitation and Molecular Attraction and Repulsion
Abstract: In classical physical modeling, the two basic types of forces that are important are long-range- and short-range forces. Typical of a long-range force is gravitation, of which effect throughout the solar system determines the natures of planets and moons. Typical of a short range force is the local attractive and repulsive force between molecules, of which effects are fundamental, for example, in heat transfer, elasticity and fluid flow phenomena. This chapter examines both of these types of forces. To develop some intuition about gravitation, the chapter discusses some new possibilities for the force of gravity. It then discusses Newton's Law of Gravitation and formulates a numerical model of Newtonian gravitation in more than one dimension. It shows the way to generalize the basic concepts of position, velocity, and acceleration. As each of these quantities has both magnitude and direction, vector notation is used in the chapter. The chapter further discusses discrete gravitation and planetary motion and summarizes the generalized Newton's method. Physically, molecules behave in simple way. Two molecules attract when relatively far apart and repel when relatively close, and repulsion is a much greater force than is attraction. The chapter explains some classical molecular forces.
Publication Year: 1980
Publication Date: 1980-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 1
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