They are probably the first thing you learn in your physics class. Work energy and power conservation of energy collisions notes in pdf physical definition work. Workthe work done by a constant force is defined as the scalar product of force and the magnitude of displacement under the influence of force. Revision notes for icse class 10 physics chapter 2 free pdf download. Work done by the force is positive if the angle between force and displacement is acute 0 work, energy, and power work done by a constant and variable force work done by a constant force. The kinetic energy of an object can be related to its mass and velocity with the formula, this formula for kinetic energy can be found from the equation for work, if the force is in the same direction as the objects displacement. This is possible only when you have the best cbse class 11 physics study material and a smart preparation plan. This cbse notes contains cbse key notes, cbse revision notes, short key notes, images, diagrams of the complete chapter 11 titled work, power and energy of science taught in class 9. Work, power, and energy are among the most important concepts of mechanics. Energy, work, and power energy is a very important concept both in physics and in our world at large. A person of mass 70kg runs up a flight of stairs with a vertical height of 5m.
Work, energy and power pdf notes, important questions and synopsis. To register physics tuitions on to clear your doubts. This is a complete set of notes of work energy and power which is a part of physics syllabus for neet, jee. Work done by the force is equal to the product of the force and the displacement of the object in the direction of force. 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. The bigger unit of power is kilowatt and represented by kw. The terms work, energy and power are frequently used in everyday language. Download study material for preparation of advanced for free. In a drought affected region she may be required to carry it over large. Work, power and energy class 9 notes here we have provided summary and revision notes for class 9 science chapter 11. Work and energy class 9 notes science mycbseguide cbse.
Iitjee work, power and energy solved questions pdf. In this article, we will learn all about the concept of work, power and energy. Note if power is more, work is done fast and vice versa. Cbse notes class 11 physics work, power, and energy. Class 11 physics revision notes for chapter 6 work, energy and. Work energy and power notes for class 11 pdf is considered as one of the most important chapters to be studied for class 11 cbse board examination. Along the way, well talk about work, kinetic energy, potential energy, and conservation of energy. Energy comes in many different forms, some of which you might already be familiar with. Energy, work, and power oberlin college and conservatory. Work, energy and power are the most used terms in physics. It is the rate of work done or rate of energy transfer.
A moving car, walking up stairs, lifting heavy objects, an aeroplane flying, etc are among the most common examples that give us. A farmer clearing weeds in his field is said to be working hard. Average power total work done or total energy usedtotal time taken. The concept of power is concerned with how rapidly energy is being transferred or transformed when work is done. Cbse class 9 science chapter 11 work and energy notes in pdf are available for free download in mycbseguide mobile app. Hi friends today we are providing 200 important questions on work power and energy. Study material and notes of ch 11 work and energy class 9th science. Power work done time taken and using symbols, we write this as. 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. Icse class 10 physics chapter 2 work, energy and power. Work,power and energy important question pdf for jee main. 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. Work, energy and power physics neet class topperlearning.
This work, power and energy multiple choice questions mcqs with answer and explanation as well as notes will certainly help aspirants to improve their knowledge for various technical competitive examinations. Work is said to be done only when the force applied on a body makes the body move. The unit of kinetic energy is the same as the unit of work, the joule j. Notion of potential energy, potential energy of a spring, conservative forces. Class 11 physics work, power and energy get here the notes for class 11 physics work, power and energy. Energy and power and the physics of explosions comet shoemakerlevy crashes into jupiter1 at the end of the cretaceous period, the golden age of dinosaurs, an asteroid or comet about 10 miles in diameter headed directly towards.
Selina icse solutions for class 10 physics chapter 2 work, energy and power. Work energy and power conservation of energy collisions. It is measured by the product of the force and the distance moved in the direction of the. This article deals with the summary of work, power and energy, formulas and how they are related to each other in a crux form which not only clear your concepts but also help in your preparation. Just a few of the many types of energy are mechanical energy, chemical energy, electrical energy, thermal energy, and nuclear energy. Important notes are also helpful for revision when you have less time and have to study many topics. Class 11 physics revision notes for chapter 6 work, energy and power free pdf download. Phys068 energy, work, and power revised \ch01 energy work, and power scofield supplemental notes september 8, 2009 page 1 of 12 chapter 1.
Work and energy can be considered as two sides of the same coin. When a force acts on an object and the object actually moves in the direction of. Let us assume the variable force works from position xi to xf then according to the workenergy theorem the change in the kinetic energy is equals to the work done. Work is the result of a force, acting over a certain distance. A car moving, a rocket taking off, an aero plane flying, are a few of the events which take place regularly and can give us insight into the concept of work and energy. Though the best notes are those which are written by yourself, yet at times due to unavoidable circumstances we urgently need notes which are best in content as well quality. Cbse class 11 physics notes chapter 6 work energy and power. Iit jee handwritten notes pdf for class 11 and class12 physics jee notes of alternating current. When the point of application of force moves in the direction of the applied force under its effect then work is said to be done. Work, energy and power tuesday february 10th reading.
Work is said to be done when the force is applied on a body and the body covers a certain distance. Energy cant be created or destroyed, it can only be changed from one type into another type. Work, energy, and power is an important topic from jee main jee advanced exam point of view. Work, energy and power are some of the more important topics of mechanics in classical physics. If applied force f is not a constant force, then work done by this force in moving the body from position a to b will be. Important notes of physics for neet, jee for work energy and power are useful for all aspirants preparing for entrance exams including jee, neet. In physics, power is associated with energy and has a precise meaning. Work, energy and power class 8 science notes khullakitab. Work, power and energy class 9 notes science chapter 11.
Power can also be defined as the rate of transfer of energy. Candidates who are ambitious to qualify the class 11 with good score can check this article for notes. These are the most important questions for j ee main, advance, upsee, bitsat and all other entrance exams. K, energy possessed by a body by virtue of its motion. Here, youll learn about how its one of the most useful concepts in physics.
It can also be defined as the rate of change of energy. If the trip takes 7s to complete, calculate the persons power. Work is done when a force is exerted on an object, and the object moves from one place to another. Work, energy, and power notes for iit jee, download pdf. Selina concise physics class 10 icse solutions work.
1356 1274 512 924 746 611 345 1170 1419 978 939 163 590 576 806 782 870 594 1551 334 1166 674 1313 533 1338 617 926 1510 1339 1430 269 304 748 1389 1170 1259 452 816