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MOTION, >» Motion:, Motion is the change in position of a body with time., , > Distance:, , ¢ Distance is the actual length of the path travelled, by a body., , e Distance is a scalar quantity., (scalar quantity is defined as the physical quantity, that has only magnitude and no direction. For, example: distance, mass, speed, time, area,, volume, density.), , e SI unit of distance is metre., , e Distance covered is always positive. It can never, be negative or zero., , >» Displacement :, , e The shortest distance measured from the initial, to the final position of an object is known as the, displacement., , ¢ Displacement is a vector quantity., , (vector quantity is defined as the physical, quantity that has both magnitude and direction.

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For example: displacement, force, acceleration,, velocity.), , e SI unit of displacement is metre., , ¢ Displacement of the object can be positive,, negative or zero., , > If a body moves along a straight line(only in one, direction) then distance and displacement will be, equal., , >» The magnitude of displacement of a moving object, can never be greater than the distance travelled by, it.