Motion
What is Motion?
Motion occurs when an object changes its position with time.
Distance and Displacement
| Quantity | Meaning |
|---|---|
| Distance | Total path travelled |
| Displacement | Straight-line distance from start to finish |
Speed
Speed is defined as:
Speed = Distance ÷ Time
Example
A car travels 120 km in 2 hours.
Speed = 120 ÷ 2 = 60 km/h
Key Exam Tips
• Always include units
• Distinguish between scalar and vector quantities
Common Mistakes
Students often confuse distance and displacement.
Practice Questions
- A student runs 100 m in 20 s. Calculate the speed.