NCERT Solutions for Class 9 Science Chapter 11 - Work and Energy
The class 9 chapter 11 science is now made easier for the students with the comprehensive NCERT Class 9 science solutions chapter 11 PDF. Every topic and subtopic is meticulously elaborated for students to understand clearly. You can now find the PDFs of these explanations on the Vedantu website. These solutions are the one-stop guide to preparing for your exams with ease. Now, refer to them to get in-depth knowledge on essential topics of Work and Energy to ace your exams with ease. Vedantu is a platform that provides free NCERT Solutions and other study materials for students. Maths Students who are looking for better solutions, they can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.
NCERT Solutions for Class 9 Science Chapter 11
FAQs on NCERT Solutions for Class 9 Science Chapter 11
1. How Many Exercises Does this Chapter Include?
Work and energy is a vast chapter that includes about 5 exercises in total. These are mentioned below.
Exercise 11.1 - 1 Question on work and power.
Exercise 11.2 - 4 questions on energy and units of energy.
Exercise 11.3 - 3 questions on different forms of energy.
Exercise 11.4 - 4 questions on kinetic energy and its expression.
Exercise 11.5 - 21 questions on potential energy and its expression and conservation of energy.
2. Why Should you Rely on Vedantu NCERT Solutions?
NCERT solutions in class 9 Chapter 11 by Vedantu aim to help students get definite clarity on what they should focus on while preparing for their exams. Along with brief summaries on every topic and subtopic, you will also have access to different question banks that you can refer to. Further, all the questions and answers and explanations are precise, easy to understand, and reliable for quick preparation of exams. With the right study material, you can take the benefit of the doubt and gain essential knowledge on the concepts of work and energy.
3. What is the kinetic energy of an object in Chapter 11 of NCERT Solutions for Class 9 Science?
The Kinetic Energy of a particular object is the energy that it has because of its motion. It is known as the work required to accelerate the respective body of a given mass from rest to its actual velocity. Thus, any object in motion always has kinetic energy. For instance, a person walking or running, a thrown baseball, a crumb falling from a tabletop are all examples of Kinetic Energy. To know more about it, visit Vedantu website or Vedantu Mobile app. The solutions provided by Vedantu are free of cost.
4. What is work according to Chapter 11 of Class 9 Science NCERT?
Work done is as the product of two components- force (F) acting in the direction of the displacement and the magnitude of displacement (s) of the object. Thus, the two conditions required for work to be done are the action of force on an object and the displacement of the object. The formula for work done is: Work Done = Force x Displacement, W = Fs. It is a scalar quantity (because it has only magnitude and no direction) and it is measured in Joules (J).
5. What is energy according to Chapter 11 of Class 9 Science NCERT?
A body's Energy is defined, in Physics, as the capacity of that body to perform work. Energy has only magnitude and no direction i.e., it is a scalar quantity and is measured in Joules (J). The Sun constitutes the largest natural source of energy for all living creatures. Some other energy sources are nuclei of atoms, tides, and the interior of the Earth. There are several types of energy, such as Potential Energy, Kinetic Energy, Mechanical Energy, Light Energy, Chemical Energy, Electrical Energy, and Heat Energy.
6. What is the formula of Energy according to Chapter 11 of NCERT Solutions for Class 9 Science?
A body's Energy, in Physics, is defined as the capacity of that body to perform work. Energy’s SI unit is Joules. It is scalar in nature as it has only magnitude and no direction. The formula for Potential Energy, Ep, of an object is equivalent to the work done over an object of mass 'm' to raise it by a height 'h' when 'g' is the acceleration due to gravity. Therefore, Ep = mgh.
7. What is Work and Energy in Physics of Class 9?
In physics, work is defined as the sum of two factors: the force acting in the direction of displacement (F) and the amount of the object's displacement (s). The capacity of a body to produce work is defined as its energy in physics. Both Work and Energy are scalar quantities that are measured in Joules (J).