1. MASS : The term Mass represents the matter contained in a body.
2. WEIGHT: The term Weight indicates the amount of force with which the earth pulls a body towards its center.
3. DENSITY : The mass per unit volume of a substance is called its density.
4. TRANSLATORY MOTION : The motion in which all the particles of a body move through the same distance in the same time is called translatory motion.
4 (a). CURVILINEAR MOTION : When a body moves along a curved line, the motion described by the body is called curvilinear motion.
4.(b)....
