Are these practice questions for Describing Motion Around Us based on the CBSE pattern?

Yes. Every practice question is modeled on the CBSE Class 9 Science exam pattern — including MCQs, assertion-reason questions, and short-answer formats that frequently appear in CBSE papers.

Are the practice questions for Describing Motion Around Us free?

Yes. Every chapter includes free practice questions for Class 9 students to get you started.

What types of questions are included?

The practice set for Describing Motion Around Us mainly includes MCQs and CBSE-style short-answer questions, with instant feedback on each answer. For full-length textbook practice, use the NCERT Solutions page.

Are the practice questions suitable for board exam preparation?

Yes. The questions test the same concepts and depth that CBSE asks in board exams. After finishing, also solve the NCERT and NCERT Exemplar exercises for Describing Motion Around Us for full coverage.

How many practice questions are there for Describing Motion Around Us?

The number scales with chapter length and concept density. Each chapter typically has 15-50 practice questions across MCQ and short-answer formats.

Describing Motion Around Us Class 9 Science Practice Questions with Answers

easy

Name the physical quantity that is represented by the slope of a velocity-time graph.

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easy

From the velocity-time graph of a moving object, it is determined that the area enclosed by the graph line and the time axis for a 10-second interval is

150 \text{ m}

. Calculate the displacement of the object in this interval and explain the principle used.

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easy

Define average velocity and state its formula using the terms displacement and time interval.

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easy

Define the term displacement.

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easy

Recall the SI unit for acceleration.

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easy

Examine the velocity-time graph of an object moving with constant positive acceleration, starting from rest. What does the slope of the line represent?

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easy

List two examples of motion in a straight line that you can observe in daily life.

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easy

Compare the distance travelled and the magnitude of displacement for an object that completes exactly one full revolution on a circular track of radius

R

.

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easy

A car's odometer reads 2500 km at the start of a trip and 2900 km at the end. The car returns to its exact starting point. Analyze the displacement of the car for the entire trip.

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medium

Describe what a reference point is and explain its importance in describing motion.

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medium

A train starts from rest and accelerates to a velocity of

90 \text{ km/h}

in 5 minutes. Calculate its average acceleration in

\text{m/s}^2

.

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medium

Explain the difference between a scalar quantity and a vector quantity, providing one example of each from the study of motion.

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medium

A scooter moving at

10 \text{ m/s}

applies brakes and comes to a stop in 5 seconds. Assuming constant acceleration, calculate the acceleration and the distance it travels before stopping. Also, demonstrate this motion by describing its velocity-time graph.

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medium

A ball is thrown vertically upwards and reaches a maximum height of 20 m. If the acceleration due to gravity is

g = -9.8 \text{ m/s}^2

, solve for the initial velocity with which it was thrown.

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medium

A student claims that for any journey an object undertakes, the magnitude of its average velocity can never be greater than its average speed. Evaluate this claim and justify your reasoning with a supporting scenario.

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medium

Formulate a real-world problem involving a vehicle that first accelerates from rest, then moves at a constant velocity, and finally decelerates to a stop. The problem must be designed such that solving for the total distance requires using at least two different kinematic equations.

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medium

A car travels along a straight road for

200

m towards the east and then turns back to travel

50

m towards the west. Describe the total distance covered and the magnitude of the final displacement.

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medium

A satellite orbits the Earth at a constant speed of

8000 \text{ m/s}

. Apply the concept of acceleration to determine if the satellite is accelerating.

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medium

Examine a scenario where an object's average speed is a non-zero value, but its average velocity is zero. Provide a simple example.

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medium

Identify the type of motion when an object's velocity changes by unequal amounts in equal intervals of time.

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medium

Define uniform circular motion and explain why it is classified as an accelerated motion.

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medium

The position-time graphs for two runners, P and Q, are straight lines, and both start from the origin. The line for P is steeper than the line for Q. Analyze and determine which runner has a higher velocity and justify your answer.

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medium

Design an experiment to demonstrate that an object in uniform circular motion is accelerating, even if its speed is constant. List the materials required, the procedure, and justify how the expected observation proves acceleration.

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medium

A driver argues that because their car's speedometer showed a constant

60 \text{ km/h}

on a winding mountain road, the car was not accelerating. Critique this argument based on the principles of velocity and acceleration.

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medium

A cyclist travels 3 km east and then turns to travel 4 km north. Calculate the total distance travelled and the magnitude of the displacement.

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medium

Recall the first two kinematic equations for uniformly accelerated motion. List what each variable in the equations represents.

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hard

The motion of a particle is described by a position-time graph with coordinates (0s, 0m), (2s, 10m), (4s, 10m), and (6s, -10m). Analyze the motion in each of the three segments (0-2s, 2-4s, 4-6s) by calculating the velocity. Contrast the motion in the first and third segments.

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hard

A car accelerates uniformly from

18 \text{ km/h}

to

72 \text{ km/h}

over a distance of 100 m. Solve for the acceleration of the car and the time taken to cover this distance.

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hard

Summarize the information that can be obtained from a velocity-time graph. Explain how to find (a) the acceleration and (b) the displacement of an object from such a graph.

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hard

A driver sees a child on the road 50 m ahead. The driver's reaction time is 0.5 s, and the car is moving at

54 \text{ km/h}

. After reacting, the brakes produce a constant acceleration of

-5 \text{ m/s}^2

. Apply the equations of motion to determine if the car will stop before hitting the child.

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hard

Describe the nature of motion for an object based on its position-time graph when the graph is: (a) a horizontal line not on the time axis, (b) a straight line with a positive slope passing through the origin, and (c) a curve that is getting steeper.

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hard

A bus decreases its speed from

72 \text{ km/h}

to

54 \text{ km/h}

in

10

seconds. Recall the formula for average acceleration and calculate its value in

\text{m/s}^2

.

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hard

Two runners, A and B, start at the same point and finish at the same point

100

m away, taking the same amount of time. The position-time graph for runner A is a straight line, while for runner B it is a curve. Propose a reason for the difference in their instantaneous speeds and justify which runner likely exerted more net force throughout the race.

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hard

Summarize the key differences between speed and velocity. Describe a scenario where an object's average speed is not zero, but its average velocity is zero. Explain your reasoning.

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hard

Two cars, A and B, start from the same point. Car A travels 50 km due east in 1 hour. Car B travels 50 km due west in 1 hour and then returns to the starting point in the next hour. For the total two-hour duration, compare the average speed and average velocity of both cars.

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Describing Motion Around UsClass 9 Science Practice Questions