Class 9 • science • Chapter 7
Motion
True & False Quiz
Distance. Velocity. Acceleration.
✓True
✗False
25
Questions
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Ch.7
Chapter
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IX
Class
Why True & False for Motion?
How this format sharpens your conceptual clarity
🔵 Motion is the backbone of classical mechanics — every concept in physics from Newton's laws to projectile motion builds on these fundamentals.
✅ T/F tests distance vs displacement, speed vs velocity, uniform vs non-uniform motion, equations of motion, and graphical analysis.
🎯 Distance is a scalar (magnitude only); Displacement is a vector (magnitude + direction) — an object can travel a large distance with zero displacement.
📋
Read each statement carefully. Click True or False — instant feedback with explanation appears. Submit anytime; unattempted questions are marked Skipped.
Q 1
Motion is defined as the change in the position of an object with time relative to a reference point.
Q 2
A body at rest can never be considered to be in motion.
Q 3
Distance travelled by an object is always greater than or equal to its displacement.
Q 4
The SI unit of both speed and velocity is \(\mathrm{m\,s^{-1}}\).
Q 5
A scalar quantity has both magnitude and direction.
Q 6
If an object moves in a straight line without changing its direction, the magnitude of its displacement is equal to the distance travelled.
Q 7
An object moving with constant speed must always have constant velocity.
Q 8
Average speed is obtained by dividing the total displacement by the total time taken.
Q 9
If the displacement of an object is zero, its distance travelled must also be zero.
Q 10
Uniform motion means covering equal distances in equal intervals of time.
Q 11
A negative acceleration always means the object is moving backward.
Q 12
Acceleration is the rate of change of velocity with respect to time.
Q 13
The SI unit of acceleration is \(\mathrm{m\,s^{-2}}\).
Q 14
A horizontal line on a distance-time graph indicates that the object is stationary.
Q 15
The slope of a velocity-time graph gives the acceleration of the object.
Q 16
The area under a velocity-time graph represents the displacement of the object.
Q 17
The first equation of motion is valid only when acceleration remains constant.
Q 18
According to the equation \(\displaystyle s=ut+\frac{1}{2}at^2\), an object moving with zero acceleration covers distance proportional to the square of time.
Q 19
Uniform circular motion is an example of accelerated motion.
Q 20
An object moving in a circular path at constant speed has zero acceleration.
Q 21
If the velocity-time graph is a straight line with a positive slope, the object has uniform acceleration.
Q 22
Two objects may have the same average speed but different average velocities.
Q 23
For any moving object, the magnitude of average velocity can never exceed the average speed.
Q 24
When an object is thrown vertically upward, its acceleration becomes zero at the highest point.
Q 25
The equations of uniformly accelerated motion cannot correctly describe the motion of an object whose acceleration changes continuously with time.
Key Takeaways — Motion
Core facts for CBSE Boards & exams
1
Distance: total path length (scalar); Displacement: shortest path from start to end (vector).
2
Speed = distance/time (scalar); Velocity = displacement/time (vector).
3
Uniform motion: equal distances in equal time intervals; Non-uniform: unequal distances.
4
Equations of motion: v = u + at; s = ut + ½at²; v² = u² + 2as.
5
Uniform circular motion: speed constant but velocity changes (direction changes) — hence it IS accelerated motion.
6
Distance-time graph: slope = speed; Velocity-time graph: slope = acceleration, area = displacement.