NOTES OF MOTION
Motion
Movement of any object from one position to another position with respect to the observer
is called as Motion.
Position: Motion of any object is defined by its position with respect to the observer.
Position is the location of the object. If object changes its position with the passage of time,
it is said to be in motion.
Reference point: It is the point from which the location of object is measured. It is often
called as origin.
Any object can be located only with the help of reference point and its direction.
Example: Suppose a person changes its position with respect to a tree(a reference point)
with passage of time. In this example, person is an object and tree is a reference point.
Direction is also necessary to locate an object.
Motion in straight line:When an object moves in straight line with respect to the observer
then the motion is called straight line motion. For example, motion of lift.
Position in Straight line Motion:
, NOTES OF MOTION
Positive sign shows position in right (positive) direction.
Negative sign shows position in left (negative) direction.
Zero is usually considered as reference point or origin.
For example;
Position of X = +1m,
Position of Y = -3m.
Here + and – sign represent direction of object from origin. While 1m, 3m represent distance
of object from origin.
Vectors & Scalar
Vector is a quantity which have both magnitude and direction.
Examples: Force, position etc.
Scalar is quantity with which direction is not associated.
Examples: Temperature, mass etc.
Note: Magnitude of vector only represents numerical value of the vector without its
direction.
Distance & Displacement
Distance is the actual path travelled by an object from its initial position to final position. It
is a scalar quantity.
Motion
Movement of any object from one position to another position with respect to the observer
is called as Motion.
Position: Motion of any object is defined by its position with respect to the observer.
Position is the location of the object. If object changes its position with the passage of time,
it is said to be in motion.
Reference point: It is the point from which the location of object is measured. It is often
called as origin.
Any object can be located only with the help of reference point and its direction.
Example: Suppose a person changes its position with respect to a tree(a reference point)
with passage of time. In this example, person is an object and tree is a reference point.
Direction is also necessary to locate an object.
Motion in straight line:When an object moves in straight line with respect to the observer
then the motion is called straight line motion. For example, motion of lift.
Position in Straight line Motion:
, NOTES OF MOTION
Positive sign shows position in right (positive) direction.
Negative sign shows position in left (negative) direction.
Zero is usually considered as reference point or origin.
For example;
Position of X = +1m,
Position of Y = -3m.
Here + and – sign represent direction of object from origin. While 1m, 3m represent distance
of object from origin.
Vectors & Scalar
Vector is a quantity which have both magnitude and direction.
Examples: Force, position etc.
Scalar is quantity with which direction is not associated.
Examples: Temperature, mass etc.
Note: Magnitude of vector only represents numerical value of the vector without its
direction.
Distance & Displacement
Distance is the actual path travelled by an object from its initial position to final position. It
is a scalar quantity.
