write notes on motion class 9 chapter motion
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An object is said to be in motion when its
position changes with time.
We describe the location of an object by
specifying a reference point. Motion is relative.
The total path covered by an object is said to
be the distance travelled by it.
Explanation:
uniform motion: When an object covers equal
distances in equal intervals of time, it is said
to be in uniform motion.
Non-uniform motion: Motions where objects
cover unequal distances in equal intervals of
time.
Speed: The distance travelled by an object in
unit time is referred to as speed. Its unit is
m/s.
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