# Displacement

Displacement is explained with example.

Displacement is a distance between final position and initial position of an object. It is not total of length of distance travelled by an object. It is always calculated with direction (Vector term). The movement of an object in right side is positive and movement in opposite direction is negative.

If X= Initial position of the object

Xf = Final position of the object

Displacement of the object X = Final position – Initial position

= Xf – Xi

The unit of the displacement is m, cm or km.

Eg 1:-

Travelling of an object is showing below: Calculate displacement of the object from point A to point B.

Ans-

Displacement of the object = Final position of object – Initial position of object

Final position of object = 200 m

Initial position of object = 0 m

Displacement of the object = Final position of object – initial position of object

= 200 – 0

= 200 m rightward

Hence, displacement of the object is 200 m leftward.

Eg 2 :-

Travelling of an object is showing below: Find the displacement of the object at point C, if it starts from point A.

Ans-

Calculate displacement of the object.

Displacement of the object = Final position of object – initial position of object

Final position of object = 150 m

Initial position of object = 0 m

Displacement of the object = Final position of object – initial position of object

= -150 – 0

=150 m leftward (-ve sign shows left ward movement)

Hence, displacement of the object is 150 m leftward.

Eg 3 :-

Travelling of an object is showing below: Calculate displacement of the object.

Ans-

Displacement of the object = Final position of object – initial position of object

Final position of object = 0 m

Initial position of object = 0 m

Displacement of the object = Final position of object – initial position of object

= 0 – 0

=0 m

Hence, displacement of the object is 0 m leftward.

Helping Topics

Motion

Practice sheet, class 7

Worksheet Class 9

NCERT solutions, class 7

NCERT Solutions Class 9

Distance

Time

Acceleration

Speed