Lighting and occupancy use in any space will always fall into one of the following four conditions: 1. When the position is changed, the total energy remains unchanged but is converted to a different type of energy, like kinetic energy. At which points on the pendulum are the kinetic and potential energy equal?. 6th Grade Science; Subteacher, NMS; Thun, Stephanie M; 7th Grade Science; 8th Grade Science; Advanced MS Algebra; Aman, Rebecca M; Bergin, Melissa K; Besch, Julia B. A 1400-kg car is moving at a speed of 25 m/s. •A rock at the top of a hill begins to roll down the hill = energy changes from potential to kinetic. The total energy of a system remains constant. Potential energy can be divided into many types; Gravitational potential energy, Electric Potential Energy, Elastic Potential energy etc. Thermal Energy In order to apply energy conservation to a falling ball or a roller coaster in the previous chapter, we had to assume that friction (with the air or the track) was negligible. This chapter deals with the calculation of gravitational fields and potentials in the vicinity of various shapes and sizes of massive bodies. Solar energy c. Potential energy is stored energy. Geothermal heating and cooling of both com-mercial and residential buildings is already widespread throughout the world. potential energy there is still of course negative, that is, below the value (zero) far away in the plain. , 2016) and a resource potential of over 100 GW (MOE, 2011), hydropower could be widely exploited around the country. The total amount of energy stays the same. Conservative forces, such as gravity; and dissipative forces such as friction. If you release the ball, gravity will perform work on the ball and its kinetic energy will increase. It is indeed a specific application of the law of conservation of energy, which states that the potential energy (PE) before an event must equal the kinetic energy (KE) after an event. Get ready to introduce your third graders to the amazing world of physical science! This worksheet will teach your little scientists the difference between kinetic (movement) and potential (stored) energy. Potential energy also appears in several forms. This chapter deals with the calculation of gravitational fields and potentials in the vicinity of various shapes and sizes of massive bodies. Potential Energy is an NGO that alleviates poverty and protects the environment by enabling the adoption of improved cookstoves that reduce deforestation, and mitigate climate change. Rapid growth within the field of. A single quantum event (absorption of an X-ray or gamma-ray photon) can cause ionization and subsequent biological damage due to the high energy content of the photon, which would be in excess of 10 eV (considered to be the minimum photon energy capable of causing. In this work an analytical expression of potential energy surface is derived and used to describe especially the cases where the present data fully support a model [sor94] that assumes that. gravitational energy. 1 Introduction. Fill in the missing values. potential energy there is still of course negative, that is, below the value (zero) far away in the plain. Potential Energy Function. Put the correct letter in the blank. View KINETIC-AND-POTENTIAL-ENERGY-WORKSHEET-ANS-2i6xl0w. The Romanian Energy Potential and Targets The type of resources and energy potential of renewable energy sources in Romania are summarized by the Romanian National Plan of Action for Renewable Energy (PNAER) in Fig. • Kinetic energy is proportional to the mass. Units of potential difference 1 Volt = 1 Joule/Coulomb. Physics Worksheet Work and Energy Section: Name: Mr. Learn kinetic and potential energy with free interactive flashcards. How would you design an experiment demonstrating potential and kinetic energy? 9. I introduce a lab with the intention to build background knowledge and to create experiences with magnets. Law of conservation of energy states that energy cannot be destroyed but can only be tra. Gravitational Energy, Potential Energy It is important to know the two main types of potential energy: gravitational potential energy and elastic potential energy Every object may have Potential energy but Gravitational Potential energy is only stored in the height of the object. energy produced by the decay of the nuclei of atoms 13. POTENTIAL ENERGY. In each case energy has been transferred from a source to a receiver, causing one of many possible kinds of change-productionof light, motion, and growth, to name only a few. If a spring. The kinetic energy of an object is directly proportional to how much damage it will inflict when it strikes something. Light energy b. Energy is having the power to do work. It exists in various forms. Geothermal energy is totally renewable as earth will continue to produce heat as long as we are all are here. When the water begins to fall, its potential energy is changed into kinetic energy. Electrical energy is energy derived from electric potential energy or kinetic energy. Object I has greater potential energy since it is heavier II. give this kinetic energy? 2. displacement or movement. com Energy - Forms and Uses of Energy Grade 4! Worksheet!made!by!www. The two basic types of energy. An object I with a mass of 4 kg is lifted vertically 3 m from the ground level; another object II with a mass of 2 kg is lifted 6 m up. POTENTIAL ENERGY Potential energy is stored energy and the. According to the Energy Information Administration (EIA), energy costs for heating and cooling together comprise about 42% of consumer home energy expenditures, on average. Kinetic - Potential Energy 5. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential energy, e. dθ, where θ is the angle between ! µ and B !. It is important to note the applicability of Eq. Gasoline in a storage tank(b) Potential Energy _____3. The correct definition of Potential Energy is that it is the energy possessed by an object due to its position or configuration. Work and potential energy. To calculate 'constrained potential', Natura 2000 and other protected areas are excluded from the calculations of wind energy potential. Kinetic Energy Quiz 1. Potential and Kinetic Energy : Teacher Notes Introduction The focus of this investigation is to look at the two types of mechanical energy (kinetic and potential) and realize that the sum of the two is always conserved. Work takes place when a force acts over a distance. when a light bulb is switched on heat and sound e. Energy takes various forms. Potential Energy. In this lesson students participate in an internet search to investigate the definition of energy and discover the two main types of energy, kinetic and potential energy. Which of the letters a–f in the diagram represents the potential energy of the products? ___e__ 2. Near Earth’s surface where the gravitational field g G is approximately constant, as an object moves from the ground to a height h, the change in potential energy is ∆Ug =+mgh, and the work done by gravity is Wmg =− gh. energy benefits; and perceived barriers to market adoption. Primary sources can be used directly, as they appear in the natural environment: coal, oil, natural gas and wood, nuclear fuels (uranium), the sun, the wind, tides, mountain lakes, the rivers (from which hydroelectric energy can be obtained) and the Earth heat that supplies […]. The amount of kinetic energy that a body possesses is dependent on the speed of its motion and its mass. Energy and Power and the physics of explosions Comet Shoemaker-Levy 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 the Earth with a velocity of about 20 miles per second, over ten times faster than our speediest bullets. the gravitational potential energy associated with the turtle as it was being lifted onto a ship was J, how high above the water was the turtle? 1. Examples of Potential Energy Problems Study these sample problems and the methods used to solve them. = mass x height x gravity What is Elastic Potential. Unformatted text preview: KINETIC AND POTENTIAL ENERGY WORKSHEET Name: if? 7 Determine whether the obj ects in the following problems have kinetic or potential energy. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. Potential energy is the stored energy of an interaction. The falling mass raising a lever. Geothermal energy source is one of them. Energy can be neither created nor destroyed but only changed from one form to another. In these so-called. Energy is the capacity of a physical system to do work. The kinetic energy is equal to 1/2 the product of the mass and the square of the speed. The energy of a particle or system of particles derived from position, or condition, rather than motion. The questions are drawn in large part from the U. Students will explore kinetic and potential energy while rolling a cart down a ramp at different heights. The following multiple choice questions are provided to illustrate the type of questions used in this section of the paper and to provide you with extra practice. In energy, there are two types that are frequently used such as kinetic energy and potential energy. It’s stored energy that can be used in the future. the rubber band is released, potential energy is changed to motion D Potential energy is the energy gained as work is being done to an object D The chemical energy in a can of gasoline, the energy in a rubber ball before it is dropped, and the energy in water behind a dam are all examples of potential energy. Elastic medium - A medium that, when distorted, will return to its original shape when the distorting force is removed. Lesson 12: Electric Potential Energy & Voltage To better understand electric potential energy it is a good idea to first review gravitational potential energy and figure out similarities between them. 1) Kinetic energy is a scalar (it has magnitude but no direction); it is always a positive number; and it has SI units of kg · m2/s2. The Potential Energy of an Autoencoder Hanna Kamyshanska, Roland Memisevic Abstract—Autoencoders are popular feature learning models, that are conceptually simple, easy to train and allow for efﬁcient inference and training. If the jet fighter in #3 is traveling at a height of 10,000 meters, what would the potential energy be? 5. potential and kinetic energy kit This kit includes a pendulum, a spring and a flywheel for experiments in potential and kinetic energy. Assessing the remaining energy savings potential for measures offered through existing PSC programs. Some bodies like waterfalls contain both kinetic as well as potential energy. energy associated with heat 9. • Electric Potential (V) - found for a location only – tells what the EPE would be if a charge were located there (usually talk about potential differences between two locations): U = Vq. The available potential energy of the atmosphere may be defined as the difference between the total potential energy and the minimum total potential energy which could result from any adiabatic redistribution of mass. megawatts annually of geothermal energy. ” Think of PE as stored energy that can become kinetic energy. The rock has no kinetic energy, but if you threw it off the cliff it would have quite a bit of kinetic energy by the time it hit the valley ßoor. Geothermal heating and cooling of both com-mercial and residential buildings is already widespread throughout the world. Its speed is 4. Renewable energy technologies turn these fuels into usable forms of energy—most often elec-tricity, but also heat, chemicals, or mechanical power. MS-PS3-2: Develop a model to describe that when the arrangement of objects interacting at a distance changes, different amounts of potential energy are stored in the system. The potential energy is zero E. Potential energy. BloombergNEF (BNEF), Bloomberg’s primary research service, covers clean energy, advanced transport, digital industry, innovative materials and commodities. When electrons are strongly attracted to nuclei, there are strong bonds. 8 m/s 2 near Earth's surface), multiplied by the height h. Kinetic and Potential Energy Online Quiz. Book on a table has potential energy since it can fall to the floor; skier poised at top of a slide, water at brink of a cataract, car at top of hill, anything capable of moving toward. Walk, sleep, run, eat! We're constantly using energy, whether we're moving or not. The total amount of energy stays the same. A bicycle on top of a hill, a book held over your head, and a stretched spring all have potential energy. Energy Use in Industry Industry is the major user of energy in modern society, accounting for roughly 40% of final energy use. The motion of loop-the loop is analysed using energy considerations which is simpler than using Newton's law. Hydropower, such as water in a reservoir behind a dam, is an example of gravitational potential energy. a book on the bottom shelf of a bookcase or a book on the top shelf of that same bookcase 2. At which point does the pendulum have the most kinetic energy?___ 12. 20, page 225 A particle with energy Eis bound in a nite square well potential with height Uand width 2Lsituated at L x +L. If we pull the mass aside and release it, it swings back and forth. Potential energy (PE) is a stored form of energy that can produce motion, i. advantages over other battery types (energy and power density, usable life). Kinetic Energy Quiz 1. Rafael Friedmann and Ms. about 7% of Africa’s enormous hydro potential has been harnessed. Occupied with the lights off 3. Potential Energy Potential Energy is energy of position. 2, and h is the height of the mass above some reference point]. Is the soil water potential. How are units of volts and electron volts related? How do they differ? 6. 0 kg traveling at a speed of 2. Energy 2 Forms of energy Light is a form of energy, so is sound. Potential Energy. In this lesson students participate in an internet search to investigate the definition of energy and discover the two main types of energy, kinetic and potential energy. • DACAPE is the maximum energy available to a descending parcel of air • Used to estimate the potential strength of rain-cooled downdrafts within thunderstorms • The higher the value of DCAPE, the stronger the downdraft potential • DCAPE values over 1000 J/kg are often significant and imply. Elastic Potential Energy •Elastic potential energy can be transformed into other forms of energy such as: - kinetic energy of an arrow shot by a bow - sound energy of a guitar string - gravitational potential energy of a pole-vaulter at the top of the jump - kinetic and gravitational potential energy of a person jumping on a trampoline. Fuses melt from the heat generated when too much current flows. - Spring force. +YES,+as+long+as+the+third+charge+is+negave. There are a number of important qualitative features of the behavior of the system that can be determined by just knowing this curve. cells possess a characteristic potential. Example Equilibrium Stationary (extremum) Potential Energy Note : In order to use this principle to calculate deflections for beams, we need to be able to express the total potential energy of the system Πin terms of displacement functions y(x) and then minimize it with respect to y(x). +YES,+as+long+as+the+third+charge+is+negave. Stored chemically in fuel, the nucleus of atom, and in foods. Do you think that the kinetic energy will change if the mass of the. Which letter shows the ball when it has the maximum potential energy? _____ 3. For instance, a battery is an example of potential energy. The integral form of this relationship is. The change in potential energy equals the gain in kinetic energy, which can then be used to find the speed. A familiar example of a ﬁeld is provided by the electromagnetic ﬁeld. Potential Energy Function. It is also known as restoring energy. The potential energy stored in fossil fuels are the sun’s energy captured, millions of years ago by plants. 1 attains a minimum for the solution already derived, Eqn. 1 Define work done, potential energy, kinetic energy, efficiency and power 1. An object gets kinetic energy from its mass and velocity. The rock has no kinetic energy, but if you threw it off the cliff it would have quite a bit of kinetic energy by the time it hit the valley ßoor. Also, why does the potential energy get negative values and why does it increase again as it passes a certain value (4,52 eV in hydrogen's case)?. In other words, it is energy in an object due to its motion or position, or both. Potential Energy and Energy Conservation 7. A geometric hypersurface on which the potential energy of a set of reactants is plotted as a function of the coordinates representing the molecular geometries of the system. Total energy savings potential Determining the basic energy savings potential across applications requires establishing a baseline of observed occupancy and lighting conditions. The various forms include mechanical energy (potential energy + kinetic energy), heat energy, chemical energy, electrical energy and light energy. If we know the power in watts of an appliance and how many seconds it is used we can calculate the number of joules of electrical energy which have been converted to sortie other form. Energy Worksheets. Using Potential Energy Instead of Force. potential energy does she have at the top of the building? 4. Electric Potential 3. Calculate the electric current through the point. Energy Types of Energy Potential energy Kinetic energy The ability to do work Shown by: Application of force Movement of something by that force. Add to Favourites In your Favourites. What this means is that the actual value of potential energy is not physically significant; it is only. The energy of a particle or system of particles derived from position, or condition, rather than motion. There are two types of energy, kinetic and potential. is stored energy and the energy of position, or. Post to: Description. Rapid growth within the field of. This new combination of the basic. The three factors that determine the amount of potential energy in an object are. Internal forces arise from the natural dynamics of the system in contract to external forces which are imposed from an external source. The circle next to the answer will turn yellow. Solutions to some problems on Work and Kinetic Energy Also look at the problems we did in class P10. Quantum Dots Description… • The emission and absorption spectra corresponding to the energy band gap of the quantum dot is governed by quantum confinement principles in an infinite square well potential. Roll the marble again and ask the students where the marble had kinetic energy and where it had potential energy. The questions are drawn in large part from the U. We use it everyday. 3 POWERFUL POTENTIAL:. The method of calculating force using potential energy is mentioned. Principle of Virtual Work and Minimum Potential Energy (P. You serve a volleyball with a mass of 2. ABSTRACT Potential energy curves govern the properties of materials. kinetic energy at this point, so you may be tempted to select option D, which shows 0% potential energy, and 100% kinetic energy. Introduction 1a. Calculate the electric current through the point. A firework rocket is fired vertically into the air and explodes at its highest point. Potential Energy and Conservation of Energy Potential Energy: When an object has potential to have work done on it, it is said to have potential energy, e. A skier at the top of the mountain (a) Kinetic Energy _____2. Solar energy c. Lab: Potential Energy – Bouncy Ball Lab Background Information: Energy cannot be created or destroyed. MS-PS3-3, MS-PS3-4 Temperature is a measure of the average kinetic energy of particles of matter. The World Energy Council actively contributes the insights needed by energy leaders to make effective strategic, policy and business decisions about the energy transition. All objects have a tendency to return to their position of rest as potential energy works against any displacement force. 1 The Important Stuﬀ 6. 8 kg book has been dropped from the top of the football stadium. Potential Energy Potential Energy is energy of position. Fill in the missing values. Principles of minimum potential energy and Rayleigh-Ritz Prof. UK and world production potentials were also estimated. Electric Potential 3. I cut out the Kinetic and Potential Energy mats and glued them in-side a color file folder. Potential energy can be divided into many types; Gravitational potential energy, Electric Potential Energy, Elastic Potential energy etc. This time make mass the subject. Electric motor in a toy car Chemical potential energy Electrical energy kinetic energy 4. In thermodynamics, the Gibbs free energy (IUPAC recommended name: Gibbs energy or Gibbs function; also known as free enthalpy to distinguish it from Helmholtz free energy) is a thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure (isothermal, isobaric). 7 Work Done, Potential and Kinetic Energy Students should be able to: 1. A) A spring with k = 450 N/m is compressed by 0. Work done by a variable force. Work done by a constant force: Gravitational force V. The amount of kinetic energy that a body possesses is dependent on the speed of its motion and its mass. As noted before, kinetic energy is the energy expressed through the motions of objects. Kinetic energy is energy in an object because of its motion. The correct definition of Potential Energy is that it is the energy possessed by an object due to its position or configuration. The potential energy formula. MISN-0-63 1 POTENTIAL ENERGY CURVES, MOTION, TURNING POINTS by J. a ball in your hand has more potential energy than a ball on the ground. The ball has _____ energy. On a computer, open up Internet explorer. 4) Units for energy and work are the same, the joule 5) Demonstration of the ability of an objects position being used to do work. worldenergy. Derivation of Gravitational Potential Energy Equation. Which of the following statements is true? I. Nuclear energy, which uses radioactive materials, has a variety of important uses in electricity generation, medicine, industry, agriculture, as well as in our homes. potential energy there is still of course negative, that is, below the value (zero) far away in the plain. the "potential for motion. For instance, a battery is an example of potential energy. Each group scans a QR code to see an animated picture demonstrating the relationship between kinetic energy and potential energy. What kind of energy do all moving objects have? (2009 test – question 12) a. We seek to achieve this with “Seizing Our Potential – the New Mexico State Energy Plan. Solar Energy Potential in Mexico’s Northern Border States This report is part of a series of four papers that explore the potential of renewable energy projects in the U. Other types of potential energy include chemical, which is related to the formation of chemical bonds and electrical, expressed as voltage. Chapter 8: Potential Energy and Conservation of Energy a b Work done by gravitation for a ball thrown upward that then falls back down W ab + W ba = - mgd + mg d = 0 The gravitational force is said to be a conservative force. Strain Definition: Strain is defined as the distortion of bond lengths and bond angles from their ideal values. Potential and Kinetic Energy : Teacher Notes Introduction The focus of this investigation is to look at the two types of mechanical energy (kinetic and potential) and realize that the sum of the two is always conserved. Fuses melt from the heat generated when too much current flows. Based on Born-Oppenheimer approximation, each … Potential Energy Surface - Chemistry LibreTexts. Energy: (from Greek, meaning “activity, operation”) the capacity to do work Potential energy: stored energy, not in motion Kinetic energy: energy that is in motion Materials: Large area for running Procedure: 1. preparing for the next quadrennial (2019-2022) planning cycle. About This Quiz & Worksheet. The energy that the object possessed while moving was kinetic energy and once the object returns to its state of rest, the energy is transformed into potential energy. Thus, there is conservation of energy in the system, regardless of the position of the rigid body. There have been several recent reports examining the amount of energy production the US could achieve from geothermal resources in the future. A 1400-kg car is moving at a speed of 25 m/s. The annual technically achievable energy potential of renewable energy sources (RES) Bf Consulting Total energy potential of RES 5146 thousand tones c. How much energy is stored? B) A spring with k = 520 N/m stores 7. Potential energy is energy attributed to an object by virtue of its position. Winding a watch. A) A spring with k = 450 N/m is compressed by 0. the energy efficiency potential, as they need to provide certainty and foster confidence in supply-side resource planners to invest in energy efficiency instead of traditional “steel in the ground” resources. On the line provided, write down what form of energy that is illustrated. 3 Strain Energy Density The strain energy will in general vary throughout a body and for this reason it is useful to introduce the concept of strain energy density, which is a measure of how much energy is stored in small volume elements throughout a material. You might want to use this triangle to help you with questions involving potential energy. First law of thermodynamics: Energy can change forms and be transferred but it cannot be created or destroyed. 3 POWERFUL POTENTIAL:. 1 Introduction. 9 meters above the ground. The potential energy becomes negative 19. (potential energy), a lighted flashlight (kinetic energy). C Chemical Energy - is really a form of potential energy and is the energy stored in food, gasoline or chemical combinations. So it actually turns out, when you think of it that way, that potential energy of any form, but especially gravitational potential energy-- and we'll see electrical potential energy-- it's always in reference to some other point, so it's really a change in potential energy that matters. The energy which is stored in a body because of the elevation is called as gravitational potential energy. To find and use the electric potential of point charges and charged spheres. That energy can be stored as potential, kinetic, chemical, or thermal energy and. ’s existing building stock. Mobile Experimental High Energy Laser (MEHEL)34 The MEHEL is a system that permits experimentation and provides the soldier with hands-on experience operating a HEL mounted on a Stryker combat vehicle (see Figure 7). To define the electric potential. What is the potential energy of the spring when an average force of 65. There are four major benefits to energy storage. The ball leaves your hand with a speed of 30 m/s. a ball in your hand has more potential energy than a ball on the ground. First law of thermodynamics: Energy can change forms and be transferred but it cannot be created or destroyed. For example, the chemical potential energy of propane results from the arrangement of the carbon and hydrogen atoms and the. place it far away). Learn important energy laws, what potential energy is, how joules and calories are used to measure energy and much more. As noted before, kinetic energy is the energy expressed through the motions of objects. Use the gravitational potential energy equation, and rearrange it to solve for height. This potential is only released if the object falls. Worksheet 4: Elastic Potential Energy 1. Choose from 500 different sets of kinetic and potential energy flashcards on Quizlet. You might want to use this triangle to help you with questions involving potential energy. Ifthere was no loss of energy of the fluid due to frictional forces, this work done on the fluid in the streamtube must have resulted in a change of mechanical energy of the liquid which flowed into the tube at position 1 and out of the tube at position 2. something which stores energy like a battery has potential energy. For example, you can calculate the kinetic energy of a bowling ball just before it falls to the ground. that identifies trends and future potential. Use these worksheets with kindergarten and grade one students. Chemical energy from a battery is a potential form of energy, elastic energy in a. In fact, the kinetic energy of the 0. The following energy sources can be relevant for. Let's look under the hood of the potential energy calculator. Example: Gravity & Potential Energy. Introduction 1a. 7 Work Done, Potential and Kinetic Energy Students should be able to: 1. When energy is stored in one form or another, it is called potential energy. The ball leaves your hand at 30m/s. 1 For a simple drop test, the conservation-of-energy equation is: where: m= mass h = drop height g = acceleration of gravity. 2 Recognise that when work is done energy is transferred from one form to another 1. potential energy due to that force (putting cash into account) -Potential energy is stored in system (pendulum and gravitation, wallet and bank account) -Total energy changes through work done by forces external to system (push, cash inﬂux) -System must be "leakproof" (conserve work): return to initial condition ->. To establish the relationship between electric field and electric potential. From kinetic and potential energy worksheets to kinetic vs. As temperature goes to zero all of the particles that are added go into the ground state, so the chemical potential goes to the ground state energy. Objectives Determine the relationship between height and gravitational potential energy. Other byproducts of biogas systems include non-energy products such as nutrient rich soil amendments, pelletized and pumpable fertilizers, and even feedstock for plastics and chemicals. Explain how speed and weight affect an amount of kinetic energy. They will look at illustrations such as a sleeping dog and a windmill and label them as kinetic or potential energy. UK and world production potentials were also estimated. Work done by a constant force: Gravitational force V. a ball in your hand has more potential energy than a ball on the ground. Simulation = + 2 1 gh v c Mgh = ½Mv2 + ½cMv2 Translational KE Rotational. Kinetic energy is energy in an object because of its motion. The total energy of the brick at any point in time is given by the sum of the potential and kinetic energies and is always equal to the initial potential energy. Elastic potential energy; Electric potential energy; Chemical potential energy. Potential energy is classified depending on the applicable restoring force. Wasted energy from your movements may not be enough to power your house, but it will be charging your cellphone. The fugacity. Energy of a charged sphere A total charge Q is distributed uniformly into a spherical volume of radius R. Chemical potential energy forms the swallow’s. Learn kinetic and potential energy with free interactive flashcards. How much work has been done to the block? 2. Agriculture was an early adopter for remote applications. some of the largest energyconsuming units in U. Energy from field given to charge Force Required Force required to push charges together. It is stored energy with the potential, or capability to do work. Energy-Kinetic and Potential and Numerical Examples.