Class 11 physics revision notes for chapter 6 work, energy. Moreover, work and power also discussed in this unit. May 26, 2016 work is a word that has a little bit of a different meaning in physics and today, shini is going to walk us through it. For example, producing electric energy from solar energy, etc.
File type pdf the physics classroom work energy and power worksheet answers first problem. Your physics book falls from rest down to the floor from a 82 cm high table. This course covers work, energy and power, types of energy, the difference between potential and kinetic energy, principles of levers and inclined planes, and the operation of simple machines. The physics classroom physics tutorial work and energy. If we total up the formulas for each of these contributions, it will not change except for energy going in and out. Define work, energy and power work is defined as product of the force and displacement of an object in the direction of force. In this lesson on workenergy we focus on the following. This chapter will define what physics calls work, show you how to calculate it, and explain works relationship with variable force. Mechanical energy is the sum of potential energy and kinetic energy of the system. Each toolkit can be viewed in three different ways. Defining work, components of force and work, kinetic and potential energy, mechanical energy as well as the work energy theorem. Along the way, well talk about work, kinetic energy, potential energy, conservation of energy, and mechanical advantage.
This bloke is doing work but the trolley isnt doing work. This teacher toolkit equips teachers with a collection of standardsbased, multimedia resources for preparing lessons and units on the topic of work and energy. The physics classroom work energy and power worksheet answers. Work, energy, power chapter 7 in a nutshell work is force times distance. This chapters physics video lessons help you strengthen your knowledge of work, energy, power and their relationship to each other. If w, f and s indicate work, force and displacement respectively then the work is given by the following formula. Concepts of work, kinetic energy and potential energy are discussed. File type pdf the physics classroom work energy and power worksheet answers the physics classroom work energy.
Mathematically, it is computed using the following equation. Mulungushi university phy 101 introductory physics i tutorial sheet 4 work, energy and power 1. The toolkit is supported by lesson 1 of the work, energy, and power chapter at the physics classroom tutorial. It is important to realise that in physics today, we have no knowledge of what energy is. Energy the capability of doing work is called energy. This is the classical physics view that is useful for most purposes. The object which does the work loses energy and the object on which the work is done gains energy. Nov 08, 2017 work, power and energy general knowledge work, power, and energyrelated important general knowledge and basic concept with the definition for upse, ias, ssc cgl, mts, railway, banking, and other competitive exams. Brown physics textbooks introductory physics i and ii a lecture note style textbook series intended to support the teaching of introductory physics, with calculus, at a level suitable for duke undergraduates. Introduction to work, energy, and energy resources physics. We can loosely define energy as the ability to do work, admitting that in some circumstances not all energy is available to do work. In this unit we will deal with mechanical energy of the substances.
Energy can be converted in form, but cannot be created or destroyed. Energy, kinetic energy, work, dot product, and power 8. Work is a word that has a little bit of a different meaning in physics and today, shini is going to walk us through it. For example, potential energy in the compressed spring, kinetic energy in the moving object, electromagnetic energy and heat are some of them. Defining work, components of force and work, kinetic and potential energy. They are probably the first thing you learn in your physics class. Physics work energy and power formulas with problems and.
Someone study very hard in his study room to get good marks. However, in the real world systems are seldom perfect. We do not have a picture that energy comes in little blobs of a. Work, energy and power in this section of the transport unit, we will look at the energy changes that take place when a force acts upon an object. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Because of the association of energy with work, we begin the chapter with a discussion of work. In this unit we will deal with the energy, mechanical energy, potential energy, kinetic energy, conservation of energy theorem. Energy cant be created or destroyed, it can only be changed from one type into another type. We also provide online work, energy and power calculators which allow you to calculate specific work, energy and power formula in support of the tutorials or to check and verify your own calculations in support of your homework, coursework or thesis. Physics note work, energy, and power physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest.
In this lesson on work energy we focus on the following. Brown physics textbooks introductory physics i and ii a lecture note style textbook series intended to support the teaching of introductory physics, with calculus, at a. For example,a man carrying a load is doing work but he is not doing work if he is not moving while keeping the load on his head,scientifically, work is done only when an effort or force moves an object. A crate of mass 50kg is pushed along a floor with a force of 20n for a distance of 5m. In physics we say that work is done on an object when you transfer energy to. Power measures the rate at which someone like these weightlifters or something like an. Class 11 physics revision notes for chapter 6 work.
Product of magnitude of force and the magnitude of displacement of the body during time in which force acts is called work. Kinetic energy table 71 typical values of work work is force times distancebut. The html version of the complete toolkit contains all the resources with full descriptions and links to their location on. Or in other words energy can never be created nor destroyed, it mearly changes from one form into another. During this process, the force on the cycle due to the road is 200 n and. We can distinguish their actions in physics by talking about power. It explains how to calculate the average power exerted. This physics video tutorial provides a basic introduction into power, work, and energy. Introduction to work and energy video khan academy. Formula of work is wfxs f force in newton s displacement in meters. Even though physics says that no work is done if the force does not move.
Work done by the force is equal to the product of the force and the displacement of the object in the direction of force. We will try to give examples related to each topic. Work and energy can be considered as two sides of the same coin. Introduction to work, energy, and energy resources college.
Here, youll learn about how its one of the most useful concepts in physics. In a closed system the amount of energy is constant. Physics notes class 11 chapter 6 work, energy and power. 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. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these. Workenergy fundamentals html version of complete toolkit. Energy is characterized by its many forms and the fact that it is conserved. Work, energy and power in physics table of contents. But my textbook says that when a person is pushing a huge rock and if it is not. Work, energy and power are the most used terms in physics. Work, energy and power tuesday february 10th reading. Hence, the given two continuous energy distribution in the neutrino. Produced in collaboration with pbs digital studios.
1232 174 1326 314 1340 1254 685 1488 1128 1168 153 1582 1327 255 883 1211 534 730 720 1574 425 199 368 1193 1052 1534 155 806 410 1486 7 889 746 581 425 261 1335 478 603 526 28 30 241