The power of a body is one watt if it does work at the rate of 1 joule per second 1 j s1. Work definition if an object moves in response to your application of a force, you have performed work. This is a theorem, ie a tautology because it is only true by definition of ke and by newton 2. Teachers may print the entire packet or individual think. Electrons create charge, which we can harness to do work. Concepts of work, kinetic energy and potential energy are discussed. Department of energy f a ct sheet the energy savings network plug into it. It is measured by the product of the force and the distance moved in. F x ma x d v v v v axd ax 2 2 2 0 2 2 0 2 work done by the force energy. Stations on work, power, energy and thermal heat formulas for work. General mechanicswork and power wikibooks, open books for. Determine the compression of the spring such that the block just makes it to the top of the hill. Mar 19, 2018 work power and energy fundamental law of conservation of energy energy can neither be created nor destroyed, can only be transformed from one form to another work is done when a force that is applied to an object moves that object. Fill in the blank section and substitution for formulas.
Read the following description of the execution of kenneth stewart in virginia on 23 september 1998. Download work energy power problems with solutions. If we are using one kw of power, a kwh of energy will last one hour. Work, energy and power class 11 notes physics chapter 6. When a force mass times acceleration is applied to an object and causes that object to be moved, the distance moved is the work that is done. Calculating work and power handouts activityyou will receive. It may be helpful for you to read the explanation of the power formulas, below, as we will use this as a key part of the steps in the program for you to be truly powerful. Electrical grids energy is generated and used constantly in the same amounts.
A skier of mass 70 kg is pulled up a slope by a motordriven cable. The simplest way to think about work is in terms of moving an object. Power equations formulas physics calculator work power. General mechanicswork and power wikibooks, open books. Class 11 physics revision notes for chapter 6 work, energy and power free pdf download. The think sheets are synchronized to readings from the physics classroom tutorial and to missions of the minds on physics program. Physics 0303 nonconservative forces and conservation of energy. When a force is exerted on an object, energy is transferred to the object. 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. Work energy and power conservation of energy collisions notes in pdf physical definition work 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. The further it moves under the influence of your force, the more work you perform. Questions are posed to the class to stimulate discussion and indicate how concepts are going over. Work, energy and power solutions for icse board class 10.
Work done by all the forces including the pseudo force change in kinetic energy in noninertial frame. The energy dissipated in 60 seconds can be calculated. Apr 05, 2016 since work is a scalar quantity,therefore,power is also a scalar quantity. Imagine you are pushing a heavy box across the room. Free download of step by step solutions for class 10 physics chapter 2 work, energy and power of icse board concise selina publishers.
Work done by the force is positive if the angle between force and displacement is acute 0 work energy power problems with solutions. Physics work energy and power formulas with problems and. Physics notes pdf for competitive exams general science. Sitting and looking at a computer screen is not work. Mathematically work done is defined as the dot\scalar product of force and displacement, thus it is a scalar quantity. Work with the energy equation expressed in terms of heads, and use it to determine turbine power output and pumping power requirements. A woman carrying water from a well to her house is said to be working. Tv tv 12 2 1 t1 absolute temperature of gas at volume 1 temp. However, energy is only transferred if the object moves.
Work, energy and power tuesday february 10th reading. Work done by the force is positive if the angle between force and displacement is acute 0 power is the work done in a unit of time. A farmer clearing weeds in his field is said to be working hard. Work energy and power conservation of energy collisions. Understand the use and limitations of the bernoulli equation, and apply it to solve a variety of fluid flow problems. The work done by a resultant force is equal to the change in kinetic energy that it produces. The amount of energy transferred is called the work done on the object. Work and power calculations the document shown below can be downloaded and printed. Work definition of work work is the transfer of energy.
For these two orbits, determine whether the kinetic energy of the satellite changes during the motion. But we use energy to do more kinds of work than moving furniture or automobiles. Lab three work energy power answer key lab three work energy power getting the books lab three work energy power answer key now is not type of inspiring means. Determining electric motor load and efficiency energy. Learn science work power formulas with free interactive flashcards. Then we will step through each of these topics in detail. When work is done on an object, what does the object gain. Calculate the work done by a 47 n force pushing a 0. A newtonmeter is the same thing as a joule, so the units for work are the same as those for energy joules. Math geometry physics force fluid mechanics finance loan calculator. Electric power work and energy are basically the same, with identical units.
Efficiency, power output power input vvr 120 fluid mechanics c34 calculate the pump power. Solved examples on work, power and energy study material for. Class 11 physics revision notes for chapter 6 work. Choose from 500 different sets of science work power formulas flashcards on quizlet. Power physics calculator solving for power given work and time. Energy has a large number of different forms, and there is a formula for each one. If the mass of the body is halved, its kinetic energy also gets halved. Kindle file format lab three work energy power answer key. If one object transfers gives energy to a second object, then the first object does work on the second object. Sometimes,for example,in the electrical measurements,the unit of work is expressed as watt second. In other words, power is a measure of how quickly work can be done.
If the velocity of a body is doubled, its kinetic energy becomes four times. If the force is at an angle to the displacement, you must resolve it into components. Teachers are granted permission to use them freely with their students and to use it as part of their curriculum. M energy added by machinery work pumps, turbines per unit weight of flowing fluid m h. With measured parameters taken from handheld instruments, you can use equation 1 to calculate the threephase input power to the loaded motor. If the mass of the body is doubled, its kinetic energy also gets doubled. They all operate using the same basic power source. Explain the equivalence of mechanical energy, heat energy, and work. An electric stove consumes 5 mj of energy from a 230 v power supply when turned on in 60 minutes. Work, energy and power the following pdf files represent a collection of classroomready think sheets pertaining to the topic of motion in one dimension. Along the way, well talk about work, kinetic energy, potential energy, and conservation of energy. Heat conduction and thermal resistance for steady state conditions and one dimensional heat transfer, the heat q conducted through a plane wall is given by. You could not deserted going past ebook addition or library or borrowing from your associates to way in them.
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. Energy associated with the state of motion of an object. Class 11 physics revision notes for chapter 6 work, energy. Energy cant be created or destroyed, it can only be changed from one type into another type. Calculate the kinetic energy of a truck that has a mass of 2900 kg and is moving at 55 ms. Input power measurements when directread power measurements are available, use them to estimate motor partload. Here, youll learn about how its one of the most useful concepts in physics. D e p a r t m e n t o f e n e r g y u n i t e d s ta es o f a m e r i c a determining electric motor load and efficiency most likely your operations motors account for a large part of your monthly electric bill. Work of a constant force force is parallel to displacement work of force of friction w f x cos w f x w ffric x kinetic energy 2 2 1 ek mv gravitational potential energy near a planet surface ep m g h gravitational potential energy r m m ep g elastic potential energy 2 2 1 ep k x. Increase in kinetic energy of body work done by total force acting on it. Jun 20, 2012 for n science physics, o science physics, o pure physics presented by.
Work is the application of a force over a distance. During this process, the force on the cycle due to the road is 200 n and. Define force, work, power, pressure, and energy and perform calculations involving the relationships between these mechanical terms. All of the factors listed above plus the ones listed in the power in life contentslinks page will contribute to the causal chain of power. This oer repository is a collection of free resources provided by equella. Physics calculator ac electricity design formulas newton second law of motion torque equations formulas calculator einstein energy equations calculator depreciation. You can then quantify the motor s partload by comparing the measured input. The work is calculated by multiplying the force by the amount of movement of an object w f d.
Learning objectives here is what you will be able to do when you complete each objective. Physics 0302 potential energy and conservative forces. This class includes the opportunity for students to use the personal response system prs. The power rating energy per unit time of the stove can be calculated as. Work and power equation sheet that includes word problemssix work and power problem cards.
In a drought affected region she may be required to carry it over large. Fluid power formula tv 2 tv 12 p 221 2 miscellaneous fluid power formula contd. Calculate the work done by a 47 n force pushing a pencil 0. This is an entirely simple means to specifically get guide by online. He also uses a simple example to calculate both work and power. Work w is the energy transferred to or from an object by means of a force acting on the object. Work done w is defined as the dot product of force f and displacement s. According to einstein, the mass can be transformed into energy and vice versa. In physics we say that work is done on an object when you transfer energy to that object. Information sheet with work and power equation triangles and units. 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. Interconnected power systems are the largest physical machines in existence.
The terms work, energy and power are frequently used in everyday language. P power, hp or kw q flow, gpm or m3h h head, ft or m p power, hp or kw n speed, rpm bernoullis equation v z g gravitational constant l energy losses p s suction pressure p d discharge pressure v s suction velocity d discharge velocity w work by the pump s suction height from reference z d discharge head from. Work energy transferred to or from an object by means of a force acting on the object. Energy formulas pdf energy science projects engineering formulas engineering resources formulas of energy, inertia, torque, power, work how force power torque and energy work math resources tutorials, formulas, data, statistics motor formulas rvalues all about science links thermodynamics physics modules units of energy work, energy and. A force of 10 newtons, that moves an object 3 meters, does 30 nm of work. What will happen to your kinetic energy if you triple your speed. Work is the product of force and the distance over which it moves. A small object of mass m 234 g slides along a track with elevated ends and a central flat part, as shown in below figure. Pv array systems are becoming an increasingly popular means for powering residential and commercial locations in the form of distributed generation loudat 20. In the diagram below, the spring has a force constant of 5000 nm, the block has a mass of 6. If we total up the formulas for each of these contributions, it will not change except. The proofs of the above equations are left to you as an exercise.
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