# Work Energy And Power Formulas Pdf

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Further, they are all designed with the latest academic year subject material so that any difference in the syllabus is accounted for as well. By studying from these NCERT Physics Chapter 6 Work, Energy and Power Notes for class 12 and employing sample papers, students will no difficulty be able to alleviate any tension before exams as they will be fully prepared in advance for their board exams. Together, students will be prepared to answer every type of question like subjective and objective and aim for the best in their last year of school. SelfStudys provides chapter-wise Physics Chapter 6 Work, Energy and Power revision notes as well as short keynotes for the CBSE board examination in an easy to understand and also free downloadable PDF format so students can practice it for their studies and get good marks in their board examinations.

## Review of Work, Energy and Power

The principle of work and kinetic energy also known as the work-energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.

This definition can be extended to rigid bodies by defining the work of the torque and rotational kinetic energy. Kinetic Energy : A force does work on the block. The kinetic energy of the block increases as a result by the amount of work. This relationship is generalized in the work-energy theorem. For the sake of simplicity, we will consider the case in which the resultant force F is constant in both magnitude and direction and is parallel to the velocity of the particle.

The particle is moving with constant acceleration a along a straight line. Substituting the above equations yields:. Privacy Policy. Skip to main content. Work and Energy. Search for:. Work-Energy Theorem. Learning Objectives Outline the derivation of the work-energy theorem. Work transfers energy from one place to another or one form to another. In more general systems than the particle system mentioned here, work can change the potential energy of a mechanical device, the heat energy in a thermal system, or the electrical energy in an electrical device.

Key Terms torque : A rotational or twisting effect of a force; SI unit newton-meter or Nm; imperial unit foot-pound or ft-lb. Licenses and Attributions. CC licensed content, Shared previously.

## list of physics formulas class 11 chapter Work Energy & Power

This set of 32 problems targets your ability to use equations related to work and power, to calculate the kinetic, potential and total mechanical energy, and to use the work-energy relationship in order to determine the final speed, stopping distance or final height of an object. The more difficult problems are color-coded as blue problems. Work results when a force acts upon an object to cause a displacement or a motion or, in some instances, to hinder a motion. Three variables are of importance in this definition - force, displacement, and the extent to which the force causes or hinders the displacement. Each of these three variables find their way into the equation for work.

The learning objectives in this section will help your students master the following standards:. Use the lab titled Work and Energy as a supplement to address content in this section. In this section, students learn how work determines changes in kinetic energy and that power is the rate at which work is done. Define the general definitions of the words potential and kinetic. Point out that acceleration due to gravity is a constant, therefore PE e that results from work done by gravity will also be constant. Compare this to acceleration due to other forces, such as applying muscles to lift a rock, which may not be constant. In physics, the term work has a very specific definition.

## Mechanics: Work, Energy and Power

You must have heard these terms work, energy, and power very frequently in your day to day life, like a barber cutting hair, a laborer lifting bricks and transporting them and a student studying are all said to be working. But here in physics, work is defined using very specific words and it has a very precise meaning. This means energy is something which tells about the capacity to do the work. In physics as well energy is related to work similarly but as already mentioned the definition of the word Work is very precise itself in Physics hence the definition of energy as well. We often come across the word Power as well, for example, the bodybuilder hit the punching bag with huge power, so in a very crude way, we could say that the rate of doing work is power.

Any force which conserves mechanical energy, as opposed to a nonconservative force. See statement of conservation of mechanical energy. Property of conservative forces which states that the work done on any path between two given points is the same. The energy of configuration of a conservative system. For formulae, see Definition of potential energy, gravitational potential energy, and Definition of potential energy given a position-dependent force.

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### 4 Comments

1. Albertine M. 16.06.2021 at 20:09

Power is the rate at which work is done.

2. Johanna R. 20.06.2021 at 09:57

Read MHI Group's case studies on energy transition tech. Subscribe to get instant updates.

3. Ruby H. 21.06.2021 at 06:59

In physics we say that work is done on an object when you transfer energy to that object.

4. Ernest L. 24.06.2021 at 00:48

The principle of work and kinetic energy also known as the work-energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.

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Prepaid Electricity Energy Meter is a good concept in which you can recharge its balance, like we do in our mobile phones. In this project we are building a automated system by using Arduino and GSM module. You can recharge the electricity balance through this system, just by sending a SMS. It can also disconnect the home power supply connection, if there is low or zero balance in the system. When we power up the system then it reads previous values of rupees stored in EEPROM and restores them into the variables then checks the available balance with the predefined value and take action according to them, like if available balance is greater than 15 rupees then Arduino turns On the electricity of home or office by using relay.