Speed And Velocity
§§ Introduction
Kinematics is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations. Kinematics is a branch of mechanics. The goal of any study of kinematics is to develop sophisticated mental models that serve to describe (and ultimately, explain) the motion of real-world objects.
In this lesson, we will investigate the words used to describe the motion of objects.That is, we will focus on the language of kinematics. The hope is to gain a comfortable foundation with the language that is used throughout the study of mechanics. We will study such terms as scalars, vectors, distance, displacement, speed, velocity and acceleration. These words are used with regularity to describe the motion of objects. Your goal should be to become very familiar with their meaning.
§§ Mechanics : The branch of physics which deals with the study of force and motion their relatationship is called mechanics.The study of mechanics is divided into three parts.
i) Statics: the branch of mechanics which deals with objects at rest is called statics.
ii) Kinematics : Kinematics which is derived from a Greek word kinema meaning motion, is a branch of physics,the branch of mechanics which deals with the motion of objects only
without considering the cause of motion is called kinematics.
iii) dynamics: the branch of mechanics which deals with the cause of motion is called dynamics.