To find the examples of motion in one, two and three dimensions, let us first understand the motion in one, two and three dimensions:

1. Motion in one dimension:

The motion of a body is said to be in one dimension or one –dimensional motion if it moves along a straight line in any direction. This type of motion is also called rectilinear or linear motion. Only one position co-ordinate is required to describe the position of the particle in this motion.

Examples (i) Motion of a vehicle on a straight line.

(ii) Motion of a train on a straight railway track.

(iii) Motion of an object dropped from a certain height from the ground.

(iv) A man working on a straight path etc.

2. Motion in two dimensions

The motion of a body is said to be in two dimensions or two dimensional motion if it moves ordinates are required to describe the motion of the particle.

Examples: (i) Motion of an insect on a floor

(ii) Motion of a boat in a river

(iii) Motion of earth around the sun

(iv) Motion of a shell fired from a gun

(v) Motion of a billiard ball on the billiard tale etc.

3. Motion in three dimensions: The motion of a body is said to be in three dimensions or three dimensional motion if it moves in space. In this type of motion three position co-ordinates are required to describe the position of the particle.

Examples: (i) Motion of a kite

(ii) Motion of an aeroplane

(iii) Motion of a flying bird