ABSTRACT
We start by reviewing some basic notions from elementary mechanics as applied to a moving object. Velocity is speed of motion or distance traveled per unit time; it is given, for example, in meters per second (m/s or ms-1). The rate of change of velocity is acceleration, or how fast the velocity changes; it is then ms-1 per second, which is meters per square second (ms-2). Newton’s second law of motion states that force is a measure of how much acceleration you can give to a moving mass and it is given by F =ma, wherem is mass and a is acceleration. One newton (N) is the force required to give a mass of one kilogram (1 kg) an acceleration of 1 ms-2.
