Work Energy And Power Class 11 Notes

Work done by a force in displacing a body is equal to change in its kinetic energy.

Work energy and power class 11 notes.

And k f final kinetic energy. Revision notes on work power and energy. Dronstudy provides free comprehensive chapterwise class 11 physics notes with proper images diagram. Where k i initial kinetic energy.

Physics notes class 11 chapter 6 work energy and power work when a force acts on an object and the object actually moves in the direction of force then the work is said to be done by the force. Work energy and power class 11 notes physics chapter 6 work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of applied force. Work done by the force is positive if the angle between force and displacement is acute 0 θ 90 as cos θ is positive. Work work done w is defined as the dot product of force f and displacement s.

It is measured by the product of the force and the distance moved in the direction of the force i e w f s. This signifies when the force and displacement are in same. A moving car walking up stairs lifting heavy objects an aeroplane flying etc are among the most common examples that give us insight into the concept of work power and energy. Here θ is the angle between and.

Work whenever a force acting on a body produces a change in the position of the body work is said to be done by the force. Regarding the work energy theorem it is worth noting that i if w net is positive then k f k i positive i e k f k i or kinetic energy will increase and vice versa. Work power and energy are among the most important concepts of mechanics.