NCERT Solutions for Class 9 Science Chapter 9: Forces and Laws of Motion
Science is an interesting subject, and it help students to dwell into the world of knowing and learning new things. This subject also opens numerous opportunities for students with a particular inclination toward Science in a myriad of ways. However, the difficulty level keeps increasing class by class. Therefore, students of class 9 will have to upgrade their learning skills and focus on scoring better in this subject. Class 9 is also an important class for many reasons as it prepares them for the upcoming board classes.
Class 9 Science NCERT Solutions Chapter 9: Forces and Laws of Motion introduces the correlations between the forces acting on a body. Students will get to learn about constant velocity and static equilibrium. It is crucial to understand the basic concepts related to the chapter, such as the structure of the atom and gravitation. Students will get a gist of all the previous chapters and gain knowledge of Newton’s theory. It also discusses essential facts to help students throughout the NCERT Solutions for Class 9 Science Chapter 9.
NCERT Solutions for Class 9 Science Chapter 9 are available for students. The solutions are helpful for the students as they help them score high marks in the examination. It contains detailed step-by-step explanations of all the problems under chapter 9. The Class 9 Science Chapter 9 NCERT Solutions are developed keeping in mind the concept-based approach; along with this, they have a precise answering method for examinations. NCERT Solutions for Class 9 Science Chapter 9 is a detailed and well-structured concept-based learning solution.
Extramarks is one of the leading online learning platforms in India. Lakhs of students have faith in our study materials and teaching methods. Students pursuing primary and secondary education can start with a trial account on our website and can explore other study materials and revision notes. NCERT Solutions for Class 9 Science Chapter 9 is also available for the students on our website.
Students can visit our website for the latest updates and news related to NCERT. Further, students can also refer to other class solutions such as NCERT solutions class 10, NCERT solutions class 11, and NCERT solutions class 12.
Key Topics Covered in NCERT Solutions for Class 9 Science Chapter 9
NCERT solutions class 9 Science chapter 9 explains motion and causes of motion . Further, students will learn 1st laws of motion, 2nd law of motion and 3rd law of motion. It is presented in a detailed manner with pictorial presentation and mathematical formulations. The solutions will be helpful for CBSE term-wise exams, Science Olympiads, and other competitive exams.
Some of the key topics featured in NCERT Solutions for Class 9 Science Chapter 9 are
Balanced and Unbalanced Forces
Forces are all around us. Everything involves a force, from lifting a pen to kicking a ball. For a force to be applied, you need to shift, rotate, turn, move, stop, catch, or drag, as well as turn, stop, catch, drag, or drop. Force is that causes a stationary object or object to move. It can also cause an object moving to slow down, stop, or change its motion direction.
There are two types of forces explained in NCERT Solutions for Class 9 Science Chapter 9, these are:
- Balanced forces are created when two opposing forces work together on a surface to create balance. Balanced Force describes forces that act on a body in opposite directions but are equal in magnitude. A balanced force, in simple terms, is when two equal forces work on a person in the opposite direction.
- Unbalanced forces: When two forces act in opposing directions on a surface that is not equal in size or magnitude, these forces are called unbalanced forces. Unbalanced forces are applied to a body and cause a change in its state of motion. The force’s magnitude is more significant—a body’s state of motion changes when an unbalanced force is applied.
Newton’s First Law of Motion
Newton’s First Law governs motion. A body doesn’t change its state of rest, uniform motion or motion, unless an unbalanced force acts on it. Therefore, the body will continue moving in the same direction or state before a force intervenes. It means that the body will remain in the same state of rest and uniform motion along a straight line unless it is forced to do so by an applied unbalanced force. Students can refer to NCERT Solutions for Class 9 Science Chapter 9 to understand the formation of the Law of Motion and its formula.
Inertia and Mass
Inertia refers to any property resistant to change in its current state of motion or rest. In other words, inertia refers to the property inherent in a body that attempts to maintain its current form. For example, a body at rest will remain at rest unless disturbed by an external force.
The greater the inertia, the larger the object’s mass, and vice versa. A greater object’s mass will result in a greater force required to alter its state. A heavier thing will resist changes in its state of motion or rest.
Newton’s Second Law of motion
Newton’s Second Law of Motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force.
Newton’s Second law is also called the Law of momentum.
To understand how the Second Law of motion acts on various objects, students can refer to NCERT Solutions for Class 9 Science Chapter 9.
Newton’s Third Law of motion
This law states that when two bodies interact, their forces are equal in magnitude but opposite in direction. Newton’s First Law of Motion defines force. Newton’s Second Law of Motion measures force. Newton’s Third Law of Motion links forces between two related bodies.
Newton’s Third Law of Motion explains the nature of force and what happens when one body exerts a force on another. It also reveals the directions of forces during the interaction between two bodies. What will be the relative magnitude of these forces? To find the answer to these questions, students can refer to NCERT Solutions for Class 9 Science Chapter 9.
Conservation of Momentum
Conservation of Momentum is when two bodies interact without an external force. The interaction does not affect the total momentum of the bodies involved. Two balls, for example, are moving towards one another and collide. An external force did not cause the collision of the balls; they collided as they moved toward each other.
NCERT Solutions for Class 9 Science Chapter 9: Exercise & Answer Solutions
NCERT Solutions for Class 9 Science Chapter 9, exercises, and answer solutions are available on the Extramarks website. It will help students understand the concepts quickly and help them score excellently on their exams. In addition, it helps them attain a clear understanding of Science and strengthens their subject knowledge. Students can clear their conceptual doubts by referring to our NCERT Solutions for Class 9 Science Chapter 9.
Chapter 9 is about Force, Types of Forces, and Laws of motion proposed by Sir Isaac Newton. Students will learn inertia, mass, Laws of motion, and mathematical formulation. Furthermore, the concepts are explained in a simple language combined with diagrams, activities involved and an explanation of the numerical problems. Our subject matter experts have efficiently prepared the solutions. It helps students build a strong foundation. Students can register on our website to get a trial account.
Students can click on the links below for specific questions and solutions:
- Chapter 9: Exercise 9.1 Solutions 4 Questions
- Chapter 9: Exercise 9.2 Solutions 4 Questions
- Chapter 9: Exercise 9.3 Solutions 18 Questions
Along with this, students can also refer to other solutions for primary and secondary classes:
- NCERT Solutions Class 1
- NCERT Solutions Class 2
- NCERT Solutions Class 3
- NCERT Solutions Class 4
- NCERT Solutions Class 5
- NCERT Solutions Class 6
- NCERT Solutions Class 7
- NCERT Solutions Class 8
- NCERT Solutions Class 9
- NCERT Solutions Class 10
- NCERT Solutions Class 11
- NCERT Solutions Class 12
NCERT Exemplar for Class 9 Science:
Science is a thought-provoking subject. Most students share a curiosity about this subject, but students face difficulty in remembering concepts and complex theories. Therefore, tackling this is beneficial for them to solve different questions at a higher difficulty level. In addition, it helps them remember the key concepts and definitions.
The NCERT Exemplar offers different types of questions such as multiple-choice questions, fill in the blanks, match the pair and true or false. The questions have a higher level of difficulty, which helps students get a gist of the topic and understand how to approach complex types of questions. The example is beneficial for every student in their exams. Each question asked in CBSE annual exams is wholly based on NCERT books. Therefore, students must have a good knowledge of the NCERT Exemplar. It helps crack the annual exam and clear the toughest competitive exams.
Few questions are taken from NCERT Solutions for Class 9 Science Chapter 9. However, it helps students understand how to calculate the inertia depending on the object’s mass.
Key Features of NCERT Solutions for Class 9 Science Chapter 9:
NCERT Solutions for Class 9 Science Chapter 9 is an excellent way for students to have a firm grip on the chapter’s topics. The solutions help to build concepts and guidelines for students to excel in exams. Students who are referred to our Extramarks NCERT solutions are at an advantage. They get to increase their knowledge and improve overall scores in the exams.
The key concepts from NCERT Solutions for Class 9 Science Chapter 9 are listed here:
- The solutions help one understand all the related concepts in Science that they may have been taught to date at the school level.
- NCERT Solutions for Class 9 Science Chapter 9 are presented clearly and concisely, and every topic is explained in detail in the NCERT textbooks used by the author.
- The solutions also help improve students’ overall performance by assisting them in understanding all the concepts required for analysis and practice.
- Students will be able to understand core concepts and increase their knowledge.
- Since the solutions are revised and updated, every chapter is explained in the light of current topics and the main concepts.
- The best part about the Extramarks NCERT Solutions for Class 9 Science Chapter 9 is that they provide a perfect learning platform for students. The student doesn’t have to go through lengthy calculations and try to find out the answers.