Types of Motion

Published: 01 Aug 2026

Interactive Motion & Types of Motion Lab

Class 9 Physics · Explore rest and motion relative to a reference point, then compare translatory, rotatory, and vibratory motion.

Relative Motion Controls

Reference point Ground

Object to observe Passenger

Bus speed 40 km/h

Key idea: Rest and motion are relative. The same object can be at rest for one observer and in motion for another observer.

Selected objectPassenger

Reference pointGround

Observed stateIn motion

Relative speed40 km/h

Position change?Yes

ReasonChanges position relative to ground

Select a Type of Motion

Animation speed 1.0×

Show path or trail Show particle markers

Current typeTranslatory — Linear

PathStraight line

Fixed axis?No

Main featureWhole body changes position

ExampleCar on a straight road

Particle behaviourParallel paths

Watch the object carefully. Decide whether the whole body changes position, turns about an axis, or moves to and fro about a mean position.

Correct: 0Attempted: 0

Identify the Motion

Rest and Motion

Rest: A body is at rest when its position does not change relative to its surroundings or a chosen reference point.

Motion: A body is in motion when its position changes relative to its surroundings or a chosen reference point.

Always name the reference point before deciding whether an object is at rest or in motion.

Translatory Motion

In translatory motion, the whole body moves from one place to another, and all its particles move through equal distances in the same direction at a given instant.

Linear: straight path.
Circular: circular path.
Random: irregular path.

Rotatory Motion

A body has rotatory motion when it turns about a fixed axis. Different particles move in circles of different radii around the same axis.

Examples Ceiling fan, wheel rotating on an axle, spinning top.

Vibratory Motion

Vibratory motion is a repeated to-and-fro motion about a fixed mean position.

Examples Pendulum bob, swing, vibrating ruler, tuning fork.

Quick Comparison

Motion type	What moves?	Typical path	Example
Linear translatory	Whole body	Straight	Car on a straight road
Circular translatory	Whole body	Circle	Ferris-wheel cabin
Random translatory	Whole body	Irregular	Flying bee
Rotatory	Body turns about an axis	Particles move in circles	Ceiling fan
Vibratory	Body or part of body	Back and forth	Pendulum