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## WORK, POWER AND ENERGY JEE Chapterwise Analysis, Weightage and Overview

Energy Conservation Theorem can solve a lot of questions single-handedly and this fact alone can settle the equation in favour of the chapter. Working closely with all the chapters of mechanics, it will be an understatement to say that it is one of the most important chapter in physics itself. 11 questions in the past 10 years add further to its reputation.

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### List of important topics in Work, Power and Energy JEE

• Work done by a Constant Force
• Work done by a Variable Force
• Potential Energy of a Spring
• The conservation Law of Mechanical Energy
• Elastic collision,Inelastic collision

### Work, Power and Energy JEE Syllabus

• Work done by a content force and a variable force;
• Kinetic and potential energies
• Work-energy theorem
• Power
• The potential energy of spring
• Conservation of mechanical energy, conservative and neoconservative forces;
• Elastic and inelastic collisions in one and two dimensions.

### Work, Power and Energy JEE Notes

Centre of Mass JEE

### Work, Power and Energy JEE Test Series 2022,2023,2024

List of FREE Tests
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#### Q. Work is the product of force and displacement W=f*s Force and displacement and vector quantity but still work is a scalar quantity why??

work is dot product of Force and displacement, hence it is scalar

#### Q. A coolie is holding a bag by applying a force of 15 N. He moves forward and covers the horizontal distance of 8m and then climbs up and covers the vertical distance of 10m what will be the work done by him. In the given question I am not able to understand why cos theta is taken as 90° when he walks horizontally and why theta is taken as 0° when he climbs vertically upwards?

The force acting is the gravity which is vertically downwards and the movement is in horizontal direction therefore angle is 90 degree ...where as in other case force acting is vertically downwards and distance travelled is also vertical therefore angle is 0