Class 9 Physics – Motion | Easy
Theory Notes (NCERT Based)
Physics
4 pag.
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Motion
1. Motion
An object is said to be in motion when its position changes with time with respect to a fixed
reference point.
Example:
A moving car changes its position with respect to a tree on the roadside, so it is in motion.
2. Distance
Distance is the total length of the actual path travelled by an object.
Properties:
It is a scalar quantity
It is always positive
It depends on the path followed
Example:
If a boy walks 4 m forward and then 3 m backward,
Distance = 4 + 3 = 7 m
3. Displacement
Displacement is the shortest straight-line distance between the initial and final position of an
object.
Properties:
It is a vector quantity
It has both magnitude and direction
It can be zero even when distance is not zero
Document shared on https://www.docsity.com/en/docs/class-9-physics-motion-or-easy-theory-notes-ncert-based/15849663/
Theory Notes (NCERT Based)
Physics
4 pag.
Document shared on https://www.docsity.com/en/docs/class-9-physics-motion-or-easy-theory-notes-ncert-based/15849663/
, Downloaded by: ayyan-ahmad-1 ()
Motion
1. Motion
An object is said to be in motion when its position changes with time with respect to a fixed
reference point.
Example:
A moving car changes its position with respect to a tree on the roadside, so it is in motion.
2. Distance
Distance is the total length of the actual path travelled by an object.
Properties:
It is a scalar quantity
It is always positive
It depends on the path followed
Example:
If a boy walks 4 m forward and then 3 m backward,
Distance = 4 + 3 = 7 m
3. Displacement
Displacement is the shortest straight-line distance between the initial and final position of an
object.
Properties:
It is a vector quantity
It has both magnitude and direction
It can be zero even when distance is not zero
Document shared on https://www.docsity.com/en/docs/class-9-physics-motion-or-easy-theory-notes-ncert-based/15849663/
