Motion — Class 9 MCQs with Answers
Class 9 CBSE Science · Chapter 3
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Practise the most important Class 9 CBSE Science questions from Chapter 3, "Motion". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE Board exams and the JEE & NEET foundation years apart.
To score well in "Motion", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Motion, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 9 Science mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: Motion (Class 9 Science)
Motion is described by how position changes with time, and by the quantities distance, displacement, speed, velocity and acceleration. This chapter distinguishes scalars from vectors, derives the three equations of uniformly accelerated motion, and reads motion from graphs.
- Rest and motion are relative
- An object is at rest or in motion only with respect to a chosen reference point; a passenger is at rest relative to the bus but moving relative to the road.
- Distance and displacement
- Distance is the total path length travelled, a scalar; displacement is the shortest straight-line change in position with direction, a vector.
- Scalar and vector quantities
- Scalars have magnitude only, such as distance and speed; vectors have both magnitude and direction, such as displacement and velocity.
- Speed
- The distance travelled per unit time, a scalar quantity measured in metres per second.
Motion — important questions & MCQs with answers (Class 9 Science)
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.
- Q1Easy
Which of the following is a vector quantity?
A.DistanceB.SpeedC.TimeD.Displacement✓ CorrectAnswer: D. Displacement
Explanation: Displacement has magnitude AND direction, which makes it a vector quantity. Distance, speed, and time carry only magnitude, so they are scalars.
- Q2Easy
The SI unit of velocity is:
A.km/hB.m/s✓ CorrectC.cm/sD.m/s²Answer: B. m/s
Explanation: Velocity = displacement ÷ time. With displacement in metres and time in seconds, the SI unit works out to m/s.
- Q3Easy
Acceleration is defined as:
A.Rate of change of distanceB.Rate of change of speedC.Rate of change of displacementD.Rate of change of velocity✓ CorrectAnswer: D. Rate of change of velocity
Explanation: Acceleration = (v − u) ÷ t, the rate of change of velocity. It differs from rate of change of speed or distance, since velocity includes direction.
- Q4Easy
The slope of a distance-time graph gives:
A.Speed✓ CorrectB.AccelerationC.DisplacementD.VelocityAnswer: A. Speed
Explanation: Slope of a distance-time graph = distance ÷ time = speed. Don't confuse this with a velocity-time graph, whose slope instead gives acceleration.
- Q5Easy
The first equation of motion is:
A.s = ut + ½at²B.v² = u² + 2asC.v = u + at✓ CorrectD.s = vt − ½at²Answer: C. v = u + at
Explanation: v = u + at is the first equation of motion, linking final velocity v, initial velocity u, acceleration a, and time t — no distance term appears in it.
- Q6Easy
A boy walks 4 km east and then 3 km north. What is the total distance covered?
A.5 kmB.1 kmC.7 km✓ CorrectD.3 kmAnswer: C. 7 km
Explanation: Distance is the total path length walked, regardless of direction: 4 km + 3 km = 7 km. Combining these vectorially (Pythagoras) gives 5 km, the magnitude of displacement, not distance.
- Q7Medium
A person walks 3 km north and then 4 km east. What is the magnitude of his displacement?
A.7 kmB.5 km✓ CorrectC.1 kmD.3.5 kmAnswer: B. 5 km
Explanation: Displacement is the straight-line distance between start and end points: √(3² + 4²) = √25 = 5 km, by the Pythagoras theorem.
- Q8Medium
A body covers 60 m in 4 s and the next 40 m in 6 s. The average speed is:
A.8 m/sB.12 m/sC.7 m/sD.10 m/s✓ CorrectAnswer: D. 10 m/s
Explanation: Average speed = total distance ÷ total time = (60 + 40) m ÷ (4 + 6) s = 100/10 = 10 m/s — don't average the two individual speeds directly.
- Q9Medium
A bicycle's velocity increases from 5 m/s to 15 m/s in 4 s. The acceleration is:
A.2.5 m/s²✓ CorrectB.5 m/s²C.20 m/s²D.0.4 m/s²Answer: A. 2.5 m/s²
Explanation: a = (v − u)/t = (15 − 5)/4 = 10/4 = 2.5 m/s².
- Q10Medium
From a velocity-time graph, a straight line goes from (0, 0) to (8 s, 24 m/s). The acceleration is:
A.3 m/s²✓ CorrectB.8 m/s²C.24 m/s²D.0.33 m/s²Answer: A. 3 m/s²
Explanation: Acceleration = slope of the v-t line = Δv/Δt = (24 − 0)/(8 − 0) = 3 m/s².
- Q11Medium
A car starts from rest and reaches a velocity of 20 m/s in 10 s. What is its acceleration?
A.2 m/s²✓ CorrectB.0.5 m/s²C.10 m/s²D.200 m/s²Answer: A. 2 m/s²
Explanation: a = (v − u)/t = (20 − 0)/10 = 2 m/s², since starting from rest means u = 0 m/s.
- Q12Hard
A body starts at point A, moves to B (40 m east), then to C (30 m north of B). The ratio of distance to magnitude of displacement is:
A.1:1B.70:50C.7:5✓ CorrectD.50:70Answer: C. 7:5
Explanation: Distance = 40 + 30 = 70 m. Displacement = √(40² + 30²) = √2500 = 50 m, by Pythagoras. Ratio of distance to displacement = 70:50 = 7:5.
- Q13Hard
A car travels first half of a journey at 30 km/h and second half at 60 km/h. The average speed is:
A.45 km/hB.50 km/hC.36 km/hD.40 km/h✓ CorrectAnswer: D. 40 km/h
Explanation: Let the total distance be 2d. Time = d/30 + d/60 = 3d/60 = d/20. Average speed = 2d ÷ (d/20) = 40 km/h — the simple average of 30 and 60 is not correct when time, not distance, is fixed.
- Q14Hard
A particle moves with increasing speed. On a distance-time graph, this is represented by:
A.A straight lineB.A curve with increasing slope (convex upward)✓ CorrectC.A curve with decreasing slopeD.A horizontal lineAnswer: B. A curve with increasing slope (convex upward)
Explanation: Slope of a distance-time graph equals speed, so a speed that keeps increasing produces a curve that gets steeper over time — a convex-upward curve.
Start this chapter free
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Start this chapter free →Motion — FAQs
What are the key concepts in Class 9 Science Motion?+
Motion is described by how position changes with time, and by the quantities distance, displacement, speed, velocity and acceleration. This chapter distinguishes scalars from vectors, derives the three equations of uniformly accelerated motion, and reads motion from graphs. Key ideas include Rest and motion are relative, Distance and displacement, Scalar and vector quantities, Speed.
What does Class 9 Science Chapter 3 (Motion) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "Motion": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams and the JEE & NEET foundation years.
Are these "Motion" questions free to practise?+
Yes. Sign in with Google to practise "Motion" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Motion" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Motion" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Motion" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Motion (Class 9 Science)?+
The questions that matter most test Rest and motion are relative, Distance and displacement, Scalar and vector quantities, Speed. This page shows 14 solved important MCQs with answers and explanations; all 90 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Motion?+
Yes — Class 9 Science Motion has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.