Rajasthan BoardEnglish MediumSTD 9ScienceMotion4 Marks
Question
Define motion. What do you understand by the terms ‘uniform motion’ and ‘non-uniform motion’? Explain with examples.
✓
Answer
A body is said to be in motion when its position changes continuously with respect to a stationary point taken as the reference point.
Uniform motion: A body is said to be in uniform motion if it travels equal distances in equal intervals of time in a particular direction, no matter how small these time intervals are.
For example: A car running at a constant speed of 10m/s towards east will cover the equal distance of 10m every second towards east, so its motion will be uniform.
Non-uniform motion: A body is said to be in non-uniform motion if it travels unequal distances in equal intervals of time.
For example: Motion of a freely falling ball from the roof of a tall building.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.