ABSTRACT

The subjects of this chapter are all concerned with acceleration or deceleration of the ball. In order to give some intuitive feel for the accelerations and forces involved the accelerations will be expressed in terms of the acceleration due to gravity, which is written as g, and forces will be described by the force of an equivalent weight. Because most British people think of speeds in terms of miles per hour and weight in terms of pounds these units will be used. In scientific work the basic units are the metre, kilogram and second and in the final, theoretical, chapter we shall change to these units.