Revision video physical sciences grade 12 work, energy and power. Grade 9 energy and power interim edition june 2009 topic 2. Class 11 physics revision notes for chapter 6 work, energy and power free pdf download. Workenergy theorem work, energy and power siyavula. In this live grade 12 physical sciences show we take a close look at work. Define work, energy and power work is defined as product of the force and displacement of an object in the direction of 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. Are able to define work and apply the definition to solve problems revise how draw free body diagrams to find the components of forces can state and apply the work energy theorem are able to state and apply the principle of conservation of mechanical energy.
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. Home grade5 grade5 school syllabus grade5science worksheets quiz video lessons study material work, force and energy work, force and energy generate unlimited tests and worksheets with dynamic worksheet generator. Moving water has a lot of energy and all we need to do is to harness it. Type of energy associated with the motion of an object. Grade 12 mechanics work, energy and power bishops science. Physical science physics physical sciences break 1.
Learners must be able to state what the doppler effect is for sound. Another giveaway is if you see a light or hear a sound. Learners must be able to use the equation s s l l f v v v v f. Energy cant be created or destroyed, it can only be changed from one type into another type. Ncert grade 11 chapter 6, work, energy and power, is a part of unit iv, work, energy and power that holds 17 marks of weightage in combination with unit v and vi. Practice worksheets science work, force and energy quiz for. Grade 12 work energy and power free pdf file sharing. Two trucks, p and q, are travelling in opposite directions along a straight level road. It is important to know whether a force is an conservative force or an nonconservative force in the system, because this is related to whether the force can change an objects total mechanical energy when it does. Power, work and the waterwheel activity teachengineering. Work is defined as energy transfer, energy is a scalar quantity and the sign indicates whether energy was increased or decreased. This oer repository is a collection of free resources provided by equella. To compute the power from the rate at which work is done. Class 11 physics revision notes for chapter 6 work, energy.
Sciences grade 12 paper 1 grade 11 physical sciences vectors part 1 this is an introductory clip to the grade 11 topic vectors in two dimensions. Work, energy and power gcserevision, physics, forces. We use this information to present the correct curriculum and to personalise content to better meet the needs of our users. All the best and keep a lookout for more tests on the topic. Grade 12 subject physical sciences week 12 topic doppler effect lesson 1 lesson summary for. In this lesson, we define important terms as well as discuss impulse, conservation of momentum and kinetic energy.
Yet another way to tell is if heat is being produced. Work, energy, and power mcat physical varsity tutors. Work, energy, and power an object of mass 100g moves in circular path of radius 0. Download our free tenfold education app for loads of free maths. Download revision notes for work, energy and power class 11 notes and score high in exams. So the velocity of water at the foot of the fall is maximum. Work, energy and power class 11 notes physics chapter 6. End of chapter exercises work, energy and power siyavula. Self study guides for grades 10 12 national department of. In order for work to take place, there is an amount of energy that has to be used.
Whenever you detect motion, heat, light, or sound, you can be sure that energy is at. All chapter 6 work, energy and power exercises questions with solutions to help you to revise complete syllabus and boost your score more in examinations. The video looks at the resultant of colinear vectors. Grade 11 question papers and memo physical sciences.
Do you understand the connection between work and energy. We cover different topics in different chapters in different grades but that doesnt mean that they are not related. Ncert solutions for class 11 physics chapter 6 work, energy. In fact, it is very important to note that all of the different topics related to mechanics forces, mechanical energy, momentum, rectilinear motion actually form a consistent picture of the same physical system. The solutions for all physical sciences grade 12 learners book, includes sufficient practical tasks to ensure that you develop the skills necessary to become a true scientist. Class 11 physics revision notes for chapter 6 work. Truck p travels at 15 ms1 and truck q travels at 10 ms1. The students are aware of the basic terms, work, energy and power. Chemical equilibrium calculations live grade 12 learn xtra live 2015. Motion of system of particles and rigid body and gravitation respectively. A 12 v car battery is found to be capable of storing 2.
Test how well you understood the topic by taking up the quiz below. Define work, energy and power energy is defined as capacity to do work. Physical sciences physics grade 12 textbook and workbook. Lesson objectives at the end of this lesson learners should know. The rewards are excitement, new discoveries and creative. For a certain electric car, it is necessary to develop 1. Physicists mean something very specific when they talk about work. The solutions for all physical sciences grade 12 learners book, includes sufficient practical. Forces and motion grade 11 basics of forces and drawing freebody diagrams. In this live gr 12 physical sciences show we look at the work energy theorem. A momentum and impulse a vertical projectile motion a and include comparative questions, e. You must work your way through this study guide to improve your understanding, identify your. To study physical sciences is challenging and hard work. In this lesson on work energy we focus on the following.
The meaning of doppler effect the following results will be the outcome of this lesson. Calculate the net work done on an object by taking the product of the resultant force along the plane acting on the object and its displacement along the plane 1. As a result of energy, a tv turns on, a doorbell rings, and a cat meows. Work can either change the kinetic energy or change the potential energy. We talk about going to work, doing homework, working in class. Siyavulas open physical sciences grade 12 textbook, chapter 5 on work, energy and power. Doc scientia presents the grade 12 physics textbook and workbook according to the caps document. Feb 05, 2014 in this live grade 12 physical sciences show we take a look at momentum and impulse. 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.
Grade 12 physical science p1 work, energy and power past paper question neatly compiled into one file with answers addeddate 20170310. When the work done is positive,the potential energy decreases. Siyavulas open physical sciences grade 12 textbook. In this case the object on which the force is applied gains energy. Rates of reaction live grade 12 learn xtra live 2015. A rollercoaster at the top of a slope has stored energy, which is called gravitational potential energy gpe, or sometimes potential energy pe. How long does it takes a swimmer with a power output of 275 watts to accomplish 3600 j of work if she applied a 650 n force during that time with the same power output, how far did she swim. Introduction to work and energy video khan academy. The potential energy of the water is converted in to the kinetic energy at the foot of the fall. Work, power, and energy are among the most important concepts of mechanics. Grade 12 physical science p1 work, energy and power past paper question neatly compiled into one file with answers. In ncert grade 11 chapter 6, work, energy and power, students will understand the relation. 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.
Potential energy a stretched catapult a body at a height and water collected in a dam possess potential energy. Grade 12 page 1 work energy power 01 july 2014 check list make sure you. Cbse class 11 physics notes chapter 6 work energy and power. Work and energy questions with memograde 12 physical.
Exercises for lesson on work, energy and power for grade 7. The subject matter of physical sciences is organised in six main knowledge areas. In this lesson, we revise the definition of work as well as revise the idea that power is the rate of. Warmth from a candle or a fire is a sure sign that energy is present. This page shows you exercises for each topic of the lesson. Download cbse class 11th revision notes for chapter 6 work, energy and power in pdf format for free. These are the work, energy and power class 11 notes prepared by team of expert teachers. The rate of change of total momentum of a many particle system is proportional to the net force external to the system. Here, youll learn about how its one of the most useful concepts in physics. Work,energy and power solved examples physicscatalyst.
Power is defined as the rate at which work is done or the rate at which energy is transfered to or from a system. This is the name used to describe stored energy that an object has because of its position in this case, higher above the surface of the earth. Grade 12 physical science work energy power 29 aug grade 12 physical science work energy power pdf 146. A the extract abovework, energy and power and the workenergy theorem a doppler effect a aelectric circuits internal resistance, resistors in series and parallel. In this lesson we revise important definitions, the work energy theorem, conservation of mechanical energy. Formula of work is wfxs f force in newton s displacement in meters.
Since both people exert the same force over the same distance doing the same amount of work, the man generates less power because it takes him longer. If acts in the same direction as the motion then positive work is being done. A passenger on truck p will observe truck q travelling at a. Defining work, components of force and work, kinetic and potential energy, mechanical energy as well as the work energy. Physical sciences p1 grade 11 2014 common paper eng 5. In grade 10, you saw that mechanical energy was conserved in the absence of nonconservative forces. Grade 12 subject physical sciences week 12 topic doppler effect lesson 2 lesson summary for. During this process, the force on the cycle due to the road is 200 n and. Class 11 physics chapter 6 work, energy and power 06 conservation of mechanical energy 1 iit jee duration. Example of work is when your exerting a greatforce in pushing an box to move it to the otherside of the room. It facilitates the understanding the mathematical definition of work. Nov 14, 2011 state the principle of conservation of energy apply work, power and conservation of energy to discuss energy transfers and transformations in a closed system.
Gas laws grade 11 physical science grade 11 gas laws. Informal assessment tasks are homework, class work, practical investigations. Physical sciences grade 12 table of contents siyavula. The use of equations of motion in solving problems dealing with momentum, vertical projectile motion, work, energy and power. In this science fair project, you will demonstrate the power of water by converting the kinetic energy in moving water to mechanical energy, which will lift a small weight. It is measured by the product of the force and the distance moved in the direction of the force, i. Ncert solutions for class 11 physics chapter 6 work. Newtons second law of motion expressed in terms of momentum. In this lesson we revise the work energy theorem as well as discuss the concept of power. Energy and work the energy lost by a system is exactly equal to the work done by the system. The work done by a conservative force is equal to the negative of the potential energy. The solutions for all physical sciences grade 12 learners book contains content knowledge and background information to ensure that you acquire enough, and a bit more, knowledge than required by the curriculum and assessment policy statement caps. Self study guides for grades 10 12 these documents are intended to serve as resources for teachers and learners.
In addition to content from radeg s 10 and 11 included under examinable content for grade 12, skills and knowledge from grades 10 and 11 that may be assessed in grade 12 include the following. The following results will be the outcome of this lesson. Along the way, well talk about work, kinetic energy, potential energy, conservation of energy, and mechanical advantage. Work, energy and power grade 11 physics question answer. They provide notes, examples, problemsolving exercises with solutions and examples of practical activities. Siyavulas open physical sciences grade 12 textbook, chapter 5 on work, energy and power covering end of chapter exercises. To understand how energy can be transformed from one form into another. Download work energy power problems with solutions.
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