Why Kaysons ?

Video lectures

Access over 500+ hours of video lectures 24*7, covering complete syllabus for JEE preparation.

Online Support

Practice over 30000+ questions starting from basic level to JEE advance level.

Live Doubt Clearing Session

Ask your doubts live everyday Join our live doubt clearing session conducted by our experts.

National Mock Tests

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.

Organized Learning

Proper planning to complete syllabus is the key to get a decent rank in JEE.

Test Series/Daily assignments

Give tests to analyze your progress and evaluate where you stand in terms of your JEE preparation.


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.

  2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Work, Power and Energy 1 1 1 0 1 0 2 2 1 0 2


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 Download

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

List of FREE Tests  
Paper set 1 Download Questions Download Solutions

  • 1
  • 2
  • 3
  • 4


A body of mass 2 kg is projected at  at an angle  above the horizontal. Power due to the gravitational force at its highest point is


If the heart pushes 1 cc of blood in 1 s under pressure  the power of heart is


A man does a given amount of work in 10 s. Another man does the same amount of work in 20 s. The ratio of the output power of first man to the second man is


A force  in 2 s. Power generated will be

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