# Lakhmir Singh Solutions for Class 9 Physics

Class 9 is considered one of the most important classes for students for building a strong foundation for their upcoming classes. The syllabus of class 9 is vast and a little complicated for students to understand easily. The chapters introduced in this class are difficult for students to understand easily on their own. Hence, the solutions for class 9 are created so that students will find various definitions, concepts and explanations in a simple language. Physics is a subject that needs a strong core knowledge of concepts for better apprehension of the subject. There are numericals, derivations, theory and so on covering the entire subject. Students have to clear their basic knowledge of mathematics as well in order to solve numericals effectively without making any silly mistakes. However, students who are average in maths can also learn to solve these numericals by taking references from the Lakhmir Singh Solutions for Class 9 Physics. The majority of students face difficulty in solving numericals as it involves mathematics.

To overcome this difficulty, the best way to understand each and every chapter is by taking the help of Lakhmir Singh Solutions for Class 9 Physics. The notes are provided with brief descriptions of topics, solved examples and numericals so that the difficulty of the chapters can be made easy for weak students also. Moreover, all the important derivations and numericals are covered in the solutions to learn, understand and revise the chapters easily and prepare well for their exams. Moreover, the solutions are helpful to clear the doubts of the students so that they can gain confidence in the subject.

In the Aakash Lakhmir Singh Solutions for Class 9 Physics, the teachers at the institute have provided solutions to every chapter in a lucid language. The Lakhmir Singh Textbook for Class 9 Physics consists of a total of 5 chapters. The solutions will help students to understand terms, concepts, derivations and numericals without difficulty.

The solutions for every question are provided with a detailed explanation in simple language for different chapters, including Motion, Force and Laws of Motion, Gravitation, Work and Energy, and Sound. The format structure of every chapter has been created with accuracy for the students to prepare the syllabus with a deep understanding of the subject. The solutions of each chapter focus on the important parts of the chapter and include every concept of the chapter in precise language. Students should rely on Lakhmir Singh Solutions for Class 9 Physics to grasp every chapter effortlessly and score good marks in the exam.

Aakash also provides free Pdf solutions files for Lakhmir Singh Solutions for Class 9 Physics which will help the students to access the chapters and their solutions easily. Students can revise effectively during their examination with the help of the Pdf of solutions that can be easily downloaded. Students searching for easy, reliable and accurate solutions for Class 9 Lakhmir Singh Physics will find the pdf files very useful for brushing up their concepts and a quick revision for their upcoming examinations. The pdf file of Lakhmir Singh Solutions for Class 9 Physics can be downloaded for free. The solutions are prepared by subject experts who have a good experience of the subject. There are various benefits of using Lakhmir Singh Solutions for Class 9 Physics for the students. It aims to provide students with the easiest mode of reference to every problem related to any given chapter in a straightforward language so that students can build clear concepts for their upcoming higher classes and score good grades in their final exam.

## Chapter 1- Motion

Chapter 1 Motion discusses various terms related to motion such as distance, speed, acceleration and laws of motion. Motion is defined as the change in position of a body with respect to its surroundings in a given interval of time. The motions are of three types such as linear motion, circular motion and oscillatory motion. Each and every topic has been explained in easy language, and the subject experts concisely prepare points. The students will be able to remember terms and definitions for a long time. Important points are highlighted in the chapter.

In Chapter 1 Motion, the concepts and types of motion are well explained with the help of detailed definitions, diagrams and graphs. Further, the chapter also discusses the application of these types of motion. There are different types of graphs used in this chapter, such as the Distance - Time graph for uniform and non - uniform speed of an object and also when an object is at rest and Velocity - Time graph for uniform and non - uniform acceleration of an object for a better explanation of concepts. In addition, there are solved examples and practice questions given in the chapter related to these topics. Students should revise these concepts frequently as they are usually asked in the exam.

In Chapter 1 Motion, the students will also learn about two types of quantities used in the motions: Scalar quantity and Vector quantity. A scalar quantity is defined as the quantity that has magnitude but no direction, while a vector quantity follows the laws of vector addition and has both magnitude and direction. Distance and speed are examples of scalar quantity. Displacement and velocity are examples of a vector quantity.

Chapter 1 Motion is a concept based on a graphical representation of various formulas, and students have to prepare everything well to score good marks in this chapter.

## Chapter 2- Force and Laws of Motion

Chapter 2, Force and Laws of Motion, deals with concepts of force, momentum, conservation of momentum and laws of motion. Force is defined as the natural phenomenon that can change an object's direction and velocity. The concept of force has been explained well with the help of real-life examples. Force can be either balanced or unbalanced. There are three laws of motion described in Chapter 2 Force and Laws of Motion. Force and Laws of Motion is an important chapter for class 9 Physics as it contains the basics of various topics that are repeated at an advanced level in higher classes. Therefore, students should clear their doubts in class 9 only to find the chapter difficult later on.

First Law of Motion: The first Law is also known as the Law of inertia, and according to Newton's First Law of motion, a body in the state of rest or motion will remain at rest or at a uniform motion until an external force is applied to it.

Second Law of Motion: According to the Second Law of motion, the rate of change in momentum of an object is directly proportional to the applied force, and this change is in the same direction as the force.

Third Law of Motion: According to the Third Law of motion, for every action, there is an equal and opposite reaction that acts upon the two different objects. There are several exercises given in the chapter based on these three mentioned laws. Chapter 2, Force and Laws of Motion, lucidly explains these concepts with the help of solved examples and numericals to better understand the students. It covers topics such as balanced and unbalanced forces, the First Law of motion, inertia and mass, the Second Law of motion, the Third Law of motion, conservation of motion, etc.

## Chapter 3- Gravitation

Chapter 3 Gravitation explains the concepts related to gravitation. Gravitation is the most conceptual and important chapter of class 9 Physics. Gravitation, also known as gravity, is defined as the universal force of attraction between all matter. The universal Law of gravitation states that every particle attracts every other particle in the universe. This force is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.

Chapter 3 Gravitation explains students various concepts related to falling of objects and deriving formulas for the same. The chapter is majorly focused on the derivation of formulas related to the topic Gravitation.

Acceleration due to gravity is defined as the speed with which the object falls towards the ground under the influence of gravity. It is denoted by 'g'. The value of g depends upon the two factors

• The radius of the earth - The value of g increases as the earth's radius increases from poles towards the equator.
• Height - Value of g decreases with an increase in height.

The concept of chapter 3 Gravitation explains all the formulas related to the topics with the help of derivation and figures. In addition to these, there are solved examples for the students to help them practice the exercises.

The students will be able to answer questions related to gravity with the help of solved examples. For example, mass is defined as a fundamental property of matter in a body, while weight is defined as the force acting on an object due to gravity.

The chapter also explains the term free fall. When an object falls from a certain height 'h' under the influence of gravitational force, it is known as a free fall.

Chapter 3 Gravitation also explains how Newton's Third Law of motion is related to gravitation. To score good marks in this chapter, students must practice the given derivations well and solve the numericals related to the given topics.

## Chapter 4- Work and Energy

Chapter 4 Work and Energy introduces students to the concept related to work and energy. Work is said to be done when a force applied to an object causes a displacement. The work can be either positive, negative or zero. The students will be able to understand well with the help of examples given in the chapter. The chapter consists of an introduction that explains the major topics of the chapter in brief words, terms along with their detailed explanation, solved examples, exercises and diagrammatic representations.

Work done = Force x Displacement
W = F x S

Energy is defined as the capacity to do work. Students will learn different forms of energy in this chapter, such as kinetic energy, potential energy, heat energy, light energy, chemical energy, sound energy, nuclear energy, and electrical energy.

In Chapter 4, Work and Energy, the students will also learn about the Law of conservation of energy. According to the Law of conservation of energy, energy can neither be created nor be destroyed. It can be transferred from one form to another form. The topic has been explained with the help of derivation and some solved examples. Chapter 4 Work and Energy use some daily life examples to help students build practical and theoretical basics. The rate of doing work is known as power.

The working principle of the simple pendulum is also explained well in this chapter. The chapter consists of several exercises related to each and every topic that has been explained in the chapter. The students should practice the given exercise and do a self-assessment for preparation for the upcoming exam.

## Chapter 5- Sound

Chapter 5 discusses sound and the terms related to it. Sound is defined as a form of mechanical energy that is produced with the help of vibrations. It is the sensation that is experienced through hearing. When the sound waves travel from one medium to another medium, it is known as the propagation of sound. Therefore, a medium is required for the propagation of sound. The language used in the chapter is easily understandable for the students. Every topic has been covered interactively.

In Chapter 5, Sound, the students will learn two types of waves: longitudinal waves and transverse waves. These waves are categorized based on the direction of propagation of sound waves. The parts of waves such as compression and rarefactions are also discussed in the chapter. The chapter consists of various solved examples and also diagrammatic representations wherever required. Chapter 5 sound will help students to build both the theoretical and practical concepts. The chapter will also prepare students for the higher class as it covers the major fundamentals of the topic sound.

The characteristics of sound waves such as wavelength, amplitude and frequency are also discussed in this chapter. The chapter 5 sound is very interesting, as well as scoring for the students. Therefore, students must pay attention to each and every topic and subtopic that has been explained in the chapter.

Chapter 5 Sound covers topics such as the production of sound, propagation of sound, reflection of sound, range of hearing, applications of ultrasound, the structure of the human ear and so on.

## Key features of Lakhmir Singh Solutions for Class 9 Physics

• Aakash institute provides Lakhmir Singh Solutions for Class 9 Physics in a lucid language to understand each and every concept clearly.
• The solutions are drafted by highly qualified individuals strictly as per the CBSE guidelines.
• The solutions are the easiest mode of references for answers to the questions for the students.
• Lakhmir Singh Solutions for Class 9 Physics covers all the important points and makes it easy for the students to remember their terms and definitions for a long time.
• The solutions are effective for students to prepare and revise during exams as they also include the easiest solutions to all the numericals given in the chapters.

## FAQs for Class 9 Physics Lakhmir Singh Solutions

### Q1. How are Lakhmir Singh Solutions for Class 9 Physics essential?

Physics is a concept based subject that requires a brief explanation and deep understanding of terms, definitions and derivations. Aakash 's Lakhmir Singh Solutions for Class 9 Physics covers all the important topics that can be asked in the examination. Each and every topic is clearly explained well with the help of solved examples and figures wherever required as per the question. The solutions are drafted by subject experts strictly as per the CBSE guidelines. Hence, the students will be able to answer each and every question in different ways. The solutions are also helpful during examinations for a quick revision.

### Q2. What are the topics covered in Lakhmir Singh Solutions for Class 9 Physics?

Lakhmir Singh Solutions for Class 9 Physics is created strictly as per the NCERT guidelines for the students by highly subject professionals to score well in the examination. The following topics are covered in the Lakhmir Singh Solutions for Class 9 Physics:

• Motion
• Force and Laws of Motion
• Gravitation
• Work and Energy
• Sound

### Q3. How can I download Lakhmir Singh solutions for class 9 Physics?

The Aakash Lakhmir Singh solutions for class 9 Physics are available on the Aakash website. The links are accessible, and students can easily download the free pdf file. The solutions of the chapters are divided, and students can easily access the solutions of the chapter they require. The solutions can be downloaded for free and are proven very useful during the exams. Lakhmir Singh solutions for class 9 Physics are available for students chapterwise. As per their preference, they can download the solutions of the chapter for revision and preparation.

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