The chapter Work, Power and Energy is an important part of Mechanics in the syllabus of JEE Main and JEE Advanced. In this article we bring to you the chapter notes of chapter Work Power and Energy including topics like work, work done by a variable force, conservation of Mechanical Energy, Potential Energy of a string, power etc. These notes can be used as quick revision just before the examination. It will help you to score good marks in this topic. The concept given in this article is in concise form and is based on the latest syllabus of JEE Examination 2018. Some questions are alos given in the articles which have been asked in the previous year engineering entrance exams.