 Most Affordable JEE | NEET | 8,9,10 Preparation by Kota's Top IITian Doctor Faculties

# NCERT Solutions Class 9 Science - Chapter 7 Motion - PDF Download `

NCERT solutions chapter 7 Motion for science Class 9 is designed to help students easily clear doubts and concepts. NCERT solution of science class 9 is a useful reference and guide to help students clear doubts immediately in an effective manner. NCERT solution for class 9 is designed in a way that is easy for students to understand. It is full of questions, activities and exercises which are based on CBSE exam & competitive exam. NCERT solutions for Class 9 is the work of our faculty with a lot of teaching experience. NCERT solution for Class 9 is developed with the concept based approach and the exact method for the CBSE exam. Check NCERT solution for class 9 for best score in CBSE & competitive exam. It is a detailed and well structured solution for a strong grasp on the concept based learning experience.

NCERT solutions for class 9 science Chapter 7 provides an in-depth description of motion and its properties. In this chapter, we’ll explore the various types of motion, from uniform to non-uniform, and describe and measure them using different parameters.
We’re all familiar with motion, whether it’s the movement of cars on the road, birds flying in the sky or even the movement of a person walking on a sidewalk. But what are the basic concepts of motion and how do they relate to concepts such as inertia, acceleration and momentum. Sir Isaac Newton’s laws of motion form the foundation of classical mechanics and explain how forces affect the motion of objects.

## NCERT Solutions for Class 9 Science Chapter 7 Topics

 Section Name Topic Name 7 Motion 7.1 Describing Motion 7.2 Measuring the rate of motion 7.3 Rate of change of velocity 7.4 Graphical representation of motion 7.5 Equations of Motion 7.6 Uniform circular motion

7.1 Describing Motion: The process of motion is the alteration of an object's or a group of objects' position relative to its environment over a specified time period. Motion is a fundamental principle of physics and aids in the comprehension of the movement and interaction of objects in the physical environment. The describing motion includes variables such as displacement, velocity, speed, and acceleration.

Subtopics covered in the section 7.1 Describing Motion:

7.1.1 motion along a straight line

7.1.2 uniform motion and non-uniform motion

7.2 Measuring the Rate of Motion: Different quantities and units can be used to measure the rate of motion, depending on the particular aspect of motion that is being measured.

Subtopics covered in the section 7.2 Measuring the Rate of Motion:

7.2.1 speed with direction

7.3 Rate of change of velocity: The rate at which the velocity of an object changes over time is referred to as acceleration. This can be due to changes in velocity, changes in direction, or a combination of both.

7.4 Graphical Representation of Motion: Graphs are an effective tool for visualizing various aspects of motion. This article outlines some of the most commonly used graphical representations of motion, as well as the quantities they illustrate.

Subtopics covered in the section 7.4 Graphical Representation of Motion:

7.4.1 Distance-time Graphs

7.4.2 velocity-time graphs

7.5 Equations of Motion: When an object is moving in a straight line with a uniform velocity, you can measure its speed, acceleration, and distance over a given time interval using a series of equations called the equations of motion.

7.6 Uniform Circular Motion: The term uniform circular motion is used to describe the movement of an object in a circular motion at a constant velocity. In this form of motion, the velocity remains constant, but the direction of the object is constantly changing, resulting in acceleration. The acceleration of the object is directed toward the center of its circular path, and is referred to as Centripetal Acceleration.

## Key Features of Class 9 Science Chapter 7

Class 9 Science Chapter 7, "Motion," provides an introduction to the fundamental concepts of motion, including its importance in everyday life, the various types of motion seen in the environment, and the measurement of motion and associated mathematical formulas.

• This chapter also explains the concept of distance, which is the total length of a path taken by an object, and displacement, which is the movement of an object from one direction to another.

• Speed and velocity are also discussed, with speed being the distance traveled per unit time and velocity being the displacement of an object per unit time (including direction). Finally, a comparison of speed and velocity is provided.

• Acceleration is the speed at which something changes. We'll look at how to calculate it and its units, plus and minus accelerations. We'll also look at the equations of motion used to figure out uniformly accelerated motion, and how to use them to solve motion-related problems.

• Finally, we'll look at the graph of motion, from position-time to velocity-time to acceleration-time, and how to interpret the slopes and areas underneath the curves. We'll also break down uniform motion into two types, based on how fast it moves.

Accessibility: Downloading the pdf on your device will make it easy for you to study anytime, anywhere, even if you don’t have an internet connection to access the solutions.

Comprehensive Answers: The PDF of the NCERT Solutions will provide you with detailed and precise answers to all the questions in your textbook. This will help you to understand the concepts better and improve your knowledge of your subject matter.

Clarification of Doubt: If you are in doubt or confused about any of the concepts in your chapter, you can get clear explanations from the solutions.

Exam Preparation: The solutions can be very useful during your exam preparation as they provide step by step explanations and guidance on how to solve different types of questions.

Time Effectiveness: PDF solutions save you time as you don't have to spend time searching for solutions elsewhere. You can spend more time studying and practicing instead.

Self Assessment: After completing the exercises in your textbook, you can compare your answers to the solutions to assess your performance and find areas that need improvement.