Class IX :: Chapter 8:: MOTION
Chapter-wise Multiple Choice Questions with Instant Feedback
Quick Revision Box: Chapter 8 - Motion
- Motion: Change in position with time; requires reference point.
- Distance: Total path length (scalar, SI unit: m).
- Displacement: Shortest distance from initial to final position with direction (vector, SI unit: m).
- Uniform Motion: Equal distances in equal time intervals (constant speed).
- Non-uniform Motion: Unequal distances in equal time intervals.
- Speed: Distance per unit time (scalar). Average speed = Total distance/Total time.
- Velocity: Displacement per unit time (vector). Average velocity = Total displacement/Total time.
- Acceleration: Rate of change of velocity. a = (v-u)/t (SI unit: m/s²).
- Uniform Acceleration: Equal velocity changes in equal times.
- Equations of Uniformly Accelerated Motion:
- v = u + at
- s = ut + ½at²
- v² = u² + 2as
- Graphical Analysis:
- Distance-time graph slope = speed
- Velocity-time graph slope = acceleration
- Area under v-t graph = displacement
- Uniform Circular Motion: Motion in circular path with constant speed; acceleration directed towards center (centripetal).
- Free Fall: Motion under gravity alone; g ≈ 9.8 m/s² downwards.
Basic Level Questions
Chapter Summary: Motion - Understanding How Things Move
This chapter introduces you to the fundamental concepts of motion—the change in position of an object with time. You will learn how to describe motion quantitatively using distance, displacement, speed, velocity, and acceleration, and understand the crucial differences between scalar and vector quantities. The chapter covers both uniform and non-uniform motion, teaching you to analyze real-world movements from cars on roads to objects falling under gravity.
This website helps you master these concepts through carefully designed chapter-wise MCQs at three difficulty levels. Practicing these questions trains you to apply equations correctly, interpret graphs accurately, distinguish between similar terms (like distance vs displacement), and solve numerical problems efficiently—exactly the skills needed to excel in board exams and competitive tests. The progressive difficulty ensures you build from basic understanding to solving complex, multi-step motion problems with confidence.