Motion Class 9 MCQs with Answers & Numerical Questions
Motion Class 9 MCQs with Answers & Numerical Questions
Class: CBSE Class 9
Subject: Science
Section: Physics
Topic: Motion
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 9 Science Board Examinations preparation.
Subject: Science
Section: Physics
Topic: Motion
These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 9 Science Board Examinations preparation.
1. Motion of an object is defined as:
Answer: B
Motion is defined as the change in position of an object with respect to time and reference point.
2. SI unit of speed is:
Answer: A
Speed = Distance ÷ Time.
SI unit = metre/second (m/s).
3. Odometer measures:
Answer: B
Odometer records the total distance travelled by a vehicle.
4. Speedometer measures:
Answer: C
Speedometer shows the speed of a vehicle at a particular instant.
5. If distance = 100 m and time = 20 s, speed = ?
Answer: B
Speed = Distance ÷ Time = 100 ÷ 20 = 5 m/s.
6. Uniform motion means:
Answer: B
In uniform motion, an object covers equal distances in equal intervals of time.
7. Non-uniform motion means:
Answer: B
If distance covered varies in equal time intervals, motion is non-uniform.
8. Graph of uniform motion is:
Answer: B
Distance–time graph of uniform motion is a straight line.
9. Slope of distance–time graph gives:
Answer: B
Slope = Change in distance ÷ Change in time = Speed.
10. Velocity is speed with:
Answer: B
Velocity is a vector quantity — speed + direction.
11. SI unit of acceleration:
Answer: B
Acceleration = Change in velocity ÷ Time → m/s².
12. Retardation means:
Answer: B
Retardation is negative acceleration — velocity decreases.
13. Equation: v = u + at represents:
Answer: A
It relates final velocity with initial velocity, acceleration, and time.
14. Unit of displacement:
Answer: A
Displacement is length → SI unit metre.
15. Circular motion is:
Answer: D
Circular motion repeats after fixed intervals and involves rotation.
16. Area under velocity–time graph gives:
Answer: C
Area = Velocity × Time → Displacement.
17. If velocity is constant, acceleration is:
Answer: C
No change in velocity → acceleration = 0.
18. Distance travelled in circular path equals:
Answer: C
One complete revolution = circumference of circle.
19. Uniform circular motion has:
Answer: C
Speed constant but direction changes → velocity changes.
20. A car accelerates from 0 to 20 m/s in 10 s. Acceleration = ?
Answer: B
a = (v − u)/t = (20 − 0)/10 = 2 m/s².