Saturday, 29 October 2016

definitions

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). RECTILINEAR MOTION :  When a body moves along a straight line, the motion described by the body is rectilinear motion.

5. CIRCULAR MOTION/ROTATORY MOTION : A Motion in which a body moves about a fixed axis without changing its position is called the rotatory motion.

6. OSCILLATORY MOTION :  The to and fro or back or forth motion described by an object as a whole along the same path, without any change in the shape of the object is called oscillatory motion.

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