Q1
What is motion?
AA change in position over time
BNo change at all
COnly a type of force
DA type of energy only
ICSEClass 7 (ICSE)ScienceCh 2 · Topic 1
Motion
Motion describes the change in an object's position over time, and can be uniform (constant speed) or non-uniform (changing speed).
Core concept
An object is in motion when its position changes relative to a fixed reference point over time.
How it works
Uniform motion means an object covers equal distances in equal time intervals, like a car moving at a constant speed.
Why it matters
Non-uniform motion means the speed changes, like a car accelerating or decelerating in traffic.
Key detail
Motion can be described using distance-time graphs, which visually show how an object's position changes over time.
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Quick notes
• Motion is a change in position over time.
• It's measured relative to a fixed reference point.
• Uniform motion has constant speed.
• Equal distances covered in equal time.
• Non-uniform motion has changing speed.
• Example: a car accelerating in traffic.
• Distance-time graphs show motion visually.
• Motion is fundamental to understanding physics.