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What is motion ?...

What is motion ?

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(i) A body is said to be in motion if it changes its position in relation to a reference (fixed) point.
(ii) Some examples of motion in daily life are :
(a) Cars moving on the roads.
(b) Aeroplanes glying in the air.
(c ) Blades of a fan going round.
(d) Different parts of machines moving in different ways.
(e ) Fishes swimming in water.
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