Motion

MICRO LESSON 1

What is Motion?

Picture it: A car changes its position from one street to another. That change is motion.

Simple: An object is in motion when its position changes with time relative to a reference point.

Example: A bus moving past a bus stop.

Quick Check: Is a parked car in motion relative to the road?

MICRO LESSON 2

Reference Point

Picture it: A passenger sitting in a moving train is at rest relative to the seat but moving relative to the ground.

Simple: Motion depends on what you compare the object with.

Example: You are still relative to your chair but moving with Earth.

Quick Check: Can the same object be at rest and in motion?

MICRO LESSON 3

Distance

Picture it: If you walk around a park, distance counts the full path.

Simple: Distance is the total path travelled.

Example: One full 400 m track lap gives 400 m distance.

Quick Check: Can distance be zero after moving?

MICRO LESSON 4

Displacement

Picture it: If you return to where you started, your displacement is zero.

Simple: Displacement is the shortest straight-line change from start to finish with direction.

Example: One track lap: distance 400 m, displacement 0.

Quick Check: Can displacement be less than distance?

MICRO LESSON 5

Speed

Picture it: Two cyclists travel the same distance, but the one taking less time is faster.

Simple: Speed = distance ÷ time.

Example: 100 km in 2 hours = 50 km/h.

Quick Check: What is the speed for 60 km in 3 hours?

MICRO LESSON 6

Velocity

Picture it: A car moving at 40 km/h east has velocity because direction is included.

Simple: Velocity is speed in a specific direction.

Example: 20 m/s north.

Quick Check: Can speed stay same while velocity changes?

MICRO LESSON 7

Acceleration

Picture it: A bus leaving a stop becomes faster every second.

Simple: Acceleration is the rate of change of velocity.

Example: Velocity rises from 0 to 20 m/s.

Quick Check: What is acceleration if velocity stays constant?

MICRO LESSON 8

Motion Graphs

Picture it: Graphs turn movement into a picture.

Simple: A distance-time graph shows how distance changes with time; slope represents speed.

Example: A steeper line means greater speed.

Quick Check: What does a horizontal distance-time line show?