Rainbow 🌈 Mind Map of Motion
Understand rest, motion, distance, displacement, speed, velocity, and different types of motion through colourful notes and simple examples.
🔴 Introduction to Motion
A body is said to be at rest when its position does not change with respect to a chosen reference point or its surroundings.
A body is said to be in motion when its position changes with time relative to that reference point or its surroundings.
Example: A student sitting inside a moving bus is at rest relative to the bus but is in motion relative to a person standing beside the road.
Rainbow mind map of motion — tap the image to view it clearly.
🟠 Types of Motion
Motion can be classified according to the path followed and the way an object moves.
Translatory Motion
Every part of an object moves through the same distance in the same direction. Example: a car moving on a straight road.
Rotatory Motion
An object rotates about a fixed axis. Example: a spinning fan or wheel.
Circular Motion
An object moves along a circular path. Example: the hands of a clock.
Oscillatory Motion
An object repeatedly moves to and fro about its mean position. Example: a pendulum.
Periodic Motion
A motion that repeats itself after equal intervals of time. Example: Earth's revolution around the Sun.
Random Motion
A motion with no fixed path or direction. Example: the movement of a flying butterfly.
🟡 Motion Is a Relative Term
The state of rest or motion depends on the observer and the chosen reference point.
For a passenger, another passenger sitting beside them is at rest. For a person standing outside, both passengers are moving with the bus.
🟢 Distance and Displacement
Distance
The total length of the actual path travelled by an object.
Quantity: Scalar
SI unit: metre (m)
Displacement
The shortest straight-line distance from the initial position to the final position, with direction.
Quantity: Vector
SI unit: metre (m)
Distance follows the complete path; displacement connects the starting and ending points directly.
🔵 Speed and Velocity
Speed
Speed is the rate of change of distance with time.
Quantity: Scalar
Velocity
Velocity is the rate of change of displacement with time.
Quantity: Vector
SI unit of both speed and velocity: metre per second (m/s).
🟣 Uniform and Non-Uniform Motion
| Feature | Uniform Motion | Non-Uniform Motion |
|---|---|---|
| Distance covered | Equal distances in equal intervals of time. | Unequal distances in equal intervals of time, or equal distances in unequal intervals. |
| Speed | Remains constant. | Changes with time. |
| Example | A train moving at a constant speed on a straight track. | A car moving through traffic. |
Uniform motion
Non-uniform motion
🧠 Motion Detective: Tap to Reveal
Read each situation, guess the answer, and then open it.
1. A ceiling fan is spinning. Which motion is this?
Answer: Rotatory motion, because the fan rotates about a fixed axis.
2. A swing moves forward and backward. Which motion is this?
Answer: Oscillatory motion, because it repeatedly moves to and fro about a mean position.
3. Can distance be greater than displacement?
Answer: Yes. Distance measures the complete path, while displacement measures the shortest straight-line change in position.
4. A car covers equal distances every 10 seconds. What type of motion is it?
Answer: Uniform motion, provided it continues to cover equal distances in equal time intervals.
🎥 Video Representation of Motion
Watch the lesson to revise the complete concept visually.
❓ Frequently Asked Questions
What is motion?
Motion is the change in the position of an object with time relative to a reference point or its surroundings.
Why is motion called a relative term?
Motion is relative because the same object can appear at rest to one observer and in motion to another observer, depending on their reference points.
What are the main types of motion?
The main types include translatory, rotatory, circular, oscillatory, periodic, and random motion.
What is the difference between distance and displacement?
Distance is the total path travelled, whereas displacement is the shortest straight-line change from the initial position to the final position, including direction.
What is the difference between speed and velocity?
Speed is the rate of change of distance and has only magnitude. Velocity is the rate of change of displacement and has both magnitude and direction.
What is uniform motion?
Uniform motion occurs when an object covers equal distances in equal intervals of time, so its speed remains constant.
