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NCERT Solutions for Class 9 Chapter 4 Work and Energy


The capacity of a body to do work is called the Energy of the body. The various forms of Energies are potential energy, kinetic energy, heat energy, chemical energy, electrical energy and light energy. Work and Energy is one crucial topic that provides a necessary foundation for all future studies. Kinetic Energy of an object increases with its speed. Work and Energy are near related terms which are quite often used in our daily life activities. Here in this topic, students learn more in detail about the work, power, force, Energy, and how are they interrelated to each other. In this chapter, the concept of work is defined with different activities, numerical and examples. The chapter also deals with Energy and its various forms. Examples are given to explain all types of Energy. The chapter ends with the topic “rate of doing the work”.