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Dinesh Kumar Dwivedi

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3cb817d5b980737290598d0cd08952b3

Dinesh Kumar Dwivedi

Motion is two types
1 uniform motion
2.non uniform motion(accelerated motion)

1.uniform motion
whenbody travel equal distance in equal intervals of time is called uniform motion. 

distance time graph of uniform motion is straight line.
Examples 
car travel 10meter per second.
Bus travel 2km per hours.etc

1.non uniform motion
whenbody travel equal distance in unequal intervals of time is called uniform motion.

distance time graph of non uniform motion is curved line.
Examples
free falling objects
car travel different speed. physics class 9th note

physics class 9th note

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3cb817d5b980737290598d0cd08952b3

Dinesh Kumar Dwivedi

Displacement
when body moves one position to another position,the shortest (straight line)pathlenth distance between initial position to final position of body along with direction is called Displacement.

Displacement =velocity × time

Displacement uints are meter, centimeter, kilometer etc
Displacement is vector Quantity

Note .Displacement of moving body can be zero
Distance moving body cannot be zero. physics class 9th

physics class 9th

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3cb817d5b980737290598d0cd08952b3

Dinesh Kumar Dwivedi

Distance
The distance travelled by body is actual length of path covered by moving body irrespective of direction in which body travels.

Distance=Speed×time

Distance units  are meter, centimeter , kilometer etc

Distance is scalar Quantity Physics notes class 9th

Physics notes class 9th

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