![]() ![]() Therefore power is equal to work divided by the time taken for work that means one can calculate how much work in joules has been done by giving out a certain amount of power (watts) over some duration like minutes or hours.įormula: P = W/t where P stands for Power, W stands for work and t stands for time Power is defined as work done per unit time. – Energy exists whenever there’s an ability to do work (or produce heat), whether it comes from moving objects, an electric current running through wires etc. The work done is positive if work occurs in the direction of motion and negative if work against motion happens This means work is equal to the distance moved multiplied by weight or force applied. – Work is defined as any process that moves a body from one point to another by applying force, work can also be thought of as moving something against some kind of resistance (like an object being moved on a rough surface). Work Energy and power are two of the most important concepts in physics. So, if you’re ready to learn about work energy and power, keep reading! What are work energy and power? We will also explore some examples to help illustrate these concepts. In this blog post, we will discuss the difference between work energy and power, and how they are related. Potential energy is mathematically represented by Equation 5-1.Work Energy and power are two of the most important concepts in physics. The potential energy of the object represents the work required to elevate the object to that position from the reference point. The reference point is normally the earth's surface, but can it be any point. ![]() The measure of an object's position is its vertical distance above a reference point. When discussing mechanical potential energy, we look at the position of an object. Burning changes their relative separation distance from the elemental form to the compound form as water releases the potential energy. ![]() Potential energy also applies to energy due to separation of electrical charge and to energy stored in a spring, in other words, energy due to position of any force field.Īs an example, consider the energy stored in hydrogen and oxygen as potential energy to be released on burning. An example is the potential energy of an object above the surface of the earth in the earth's gravitational field. Potential energy is defined as the energy stored in an object because of its position. Both of these categories of energy will be discussed in this module. Stored energy is the energy contained within a substance or object. Transient energy is energy in motion, that is, energy being transferred from one place to another. It should be noted, however, that the principles involved with energy calculations are similar for all types of energy.īoth thermal and mechanical energy can be separated into two categories, transient and stored. For the purposes of this course, our discussions will be limited to mechanical and thermal forms of energy (e.g., heat). Fuel elements in a nuclear power reactor produce energy by a nuclear reaction. Coal burned in a fossil-fueled power plant is undergoing energy release by a chemical reaction. A piledriver hammer performs work by virtue of its falling motion. More advanced systems may include other types of energy such as chemical, electromagnetic, thermal, acoustic, and nuclear. Both of these terms will be explained more fully later in this chapter. ![]() Some of the more basic mechanical systems involve the concepts of potential and kinetic energy. Energy determines the capacity of a system to perform work and may be stored in various forms. Work is a measure of the amount of energy required to move an object.Įnergy is defined as the measure of the ability to do work. Energy is the measure of the ability to do work or cause a change. ![]()
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