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Chapters
▶ 2: Motion
3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 2 - Motion - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 2 - Motion")
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Solutions for Chapter 2: Motion
Below listed, you can find solutions for Chapter 2 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 2 Motion Exercise [Pages 23 - 25]
Choose the correct answer.
The area under velocity – time graph represents the ______
velocity of the moving object.
displacement covered by the moving object.
speed of the moving object.
acceleration of the moving object
Which one of the following is most likely not a case of uniform circular motion?
Motion of the Earth around the Sun.
Motion of a toy train on a circular track.
Motion of a racing car on a circular track.
Motion of hours’ hand on the dial of the clock.
Which of the following graph represents uniform motion of a moving particle?
The centrifugal force is ______.
a real force.
the force of reaction of centripetal force.
a virtual force.
directed towards the centre of the circular path.
Fill in the blanks.
Speed is a ______ quantity whereas velocity is a ______ quantity.
The slope of the distance-time graph at any point gives______.
Negative acceleration is called ______.
State whether true or false. If false, correct the statement.
The motion of a city bus in a heavy traffic road is an example for uniform motion.
True
False
State whether true or false. If false, correct the statement.
Acceleration can get negative value also.
True
false
State whether true or false. If false, correct the statement.
Distance covered by a particle never becomes zero but displacement becomes zero.
True
False
State whether true or false. If false, correct the statement.
The velocity – time graph of a particle falling freely under gravity would be a straight line parallel to the x axis.
True
False
State whether true or false. If false, correct the statement.
If the velocity – time graph of a particle is a straight line inclined to X-axis then its displacement – time graph will be a straight line.
True
False
Assertion and reason type questions.
Assertion: The accelerated motion of an object may be due to change in magnitude of velocity or direction or both of them.
Reason: Acceleration can be produced only by change in magnitude of the velocity. It does not depend the direction.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Assertion: The Speedometer of a car or a motor-cycle measures its average speed.
Reason: Average velocity is equal to total displacement divided by total time taken.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Assertion: Displacement of a body may be zero when distance travelled by it is not zero.
Reason: The displacement is the shortest distance between initial and final position.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Match the Following.
| Sr. No. | List I | List II | |
| 1. | Motion of a body covering equal distances in equal interval of time | A. |  |
| 2. | Motion with non uniform acceleration | B. |  |
| 3. | Constant retardation | C. |  |
| 4. | Uniform acceleration | D. |  |
Answer briefly
Define velocity.
Distinguish distance and displacement.
What do you mean by uniform motion?
Compare speed and velocity
What do you understand about negative acceleration?
Is the uniform circular motion accelerated? Give reasons for your answer.
What is meant by uniform circular motion? Give two examples of uniform circular motion.
Answer in detail.
Derive the equations of motion by graphical method.
Explain different types of motion.
Exercise Problems.
A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 ms–2, with what velocity will it strike the ground? After what time will it strike the ground?
Exercise Problems.
An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 m and 20 s?
Exercise Problem.
A racing car has a uniform acceleration of 4 ms–2. What distance it covers in 10 s after the start?
Solutions for 2: Motion
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 2 - Motion
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Concepts covered in Science [English] Class 9 TN Board chapter 2 Motion are Motion and Rest, Multiple Motion, Uniform Circular Motion (UCM), Types of Motion, Distance and Displacement, Speed, Velocity, Acceleration and Retardation, Displacement - Time Graph Or Distance - Time Graph, Velocity - Time Graphs, Equations of Motion by Graphical Method, Motion of Freely Falling Body, Centripetal Acceleration and Centripetal Force, Centrifugal Forces, Types of Motion.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Motion exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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