Ps gr 12 session 2 topic 2 ln work power energy2011. Work definition of work work is the transfer of energy. Class 11 physics revision notes for chapter 6 work. General mechanicswork and power wikibooks, open books. The workenergy theorem states that the net amount of work done on an object is equal to the objects final kinetic energy minus its initial kinetic energy. The words work and power must be clearly defined as science concepts and it must be further clarified to the learners. Work, energy and power examples a level maths revision.
Find the frictional force and use the work energy principle. During this process, the force on the cycle due to the road is 200 n and is directly opposed to the motion. The notion of work can be viewed as the bridge between newtons second law, and energy. Work, energy and power tuesday february 10th reading. Work converted to energy in physics problems dummies. Physics work energy power mcq translation in hindi. The amount of energy transferred is called the work done on the object. Work can be used to understand the energy of many objects that experience forces. Work, energy and power class 8 science notes khullakitab. Iitjee work, power and energy solved questions pdf. Peoples demand for electricity and fuel taxes earths supply of nonrenewable resources and forces us to find and use renewable and alternative sources.
The concepts of work and energy are closely tied to the concept of force because an applied force can do work on an object and cause a change in energy. If the magnitude of the displacement of the object is. Example of work is when your exerting a greatforce in pushing an box to. When a force is exerted on an object, energy is transferred to the object. Free pdf download of ncert solutions for class 11 physics chapter 6 work, energy and power solved by expert teachers as per ncert cbse textbook guidelines. Download work energy power problems with solutions. Define work, energy and power work is defined as product of the force and displacement of an object in the direction of force. Formula of work is wfxs f force in newton s displacement in meters. Work, energy, and power the physics classroom, 2009 page 2 the amount of work w done on an object by a given force can be calculated using. The work done in the motion of a body over a closed loop is zero for a conservation force only. In an inelastic collision, the final kinetic energy is always le energy of the system. Ncert solutions for class 11 physics chapter 6 work. A crate of mass 50kg is pushed along a floor with a force of 20n for a distance of 5m. One example is the work required to stretch a spring.
If an object or system, such as your body, exerts a force on an object and that force causes the objects position to change, you are doing work on the object. Work, energy and power are the most used terms in physics. Work, energy and power class 11 notes physics chapter 6. Work,power and energy important question pdf for jee main. In grade 10, you saw that mechanical energy was conserved in the absence of nonconservative forces. Work and energy can be considered as two sides of the same coin.
Work, energy, and power this worksheet and all related files are. Kinetic energy ke, is energy associated with motion. In pushing a load, a woman exerts a force as given by the graph below. When a physicist is talking about work, he mainly talks about a force causing a displacement of an object in the same action of line. 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. 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.
Work done force x distance moved by the force in the direction of. Work is said to be done when the force is applied on a body and the body covers a certain distance. Class 11 physics revision notes for chapter 6 work, energy and power free pdf download. This oer repository is a collection of free resources provided by equella. If an object or system, such as your body, exerts a force on an object and that force causes the objects position to change, you are doing work on the. Grade 12 work energy and power free pdf file sharing. Work done w is defined as the dot product of force f and displacement s. Work is done when a force moves something to the point at which it acts the point of application in the direction of the force. This energy we get from the food which we eat and if work is done by. Official, free, no login, fast pdf download doorsteptutor material for jee is prepared by worlds top subject experts. A skier of mass 70 kg is pulled up a slope by a motordriven cable. They are probably the first thing you learn in your physics class. Grade 12 physical science p1 work, energy and power past paper question neatly compiled into one file with answers addeddate 20170310. This worksheet and all related files are licensed under the creative commons attribution license, version 1.
Ppt work, energy, and power powerpoint presentation. Workenergy theorem work, energy and power siyavula. Workkinetic energy theorem we can now replace any work due to conservative forces by potential energy terms, i. During this process, the force on the cycle due to the. Kofax power pdf standard makes it easy for demanding customers to gain control over pdf files with the ability to create, convert, edit, assemble, fill forms and share pdf files. Chapter 6 work, kinetic energy and potential energy.