We explain what mechanical energy is and how this energy can be classified. In addition, examples and potential and kinetic mechanical energy.
We understand by mechanical energy that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. In general, mechanical energy involves both kinetic energy, elastic energy and the potential energy of an object.
Mechanical energy is conserved in conservative fields and in which they form particles of purely mechanical action, thus remaining constant over time , according to the following formulation:
Emec = Ec + Ep + Ee = cte.
Where Ec is the kinetic energy of the system, Ep its gravitational potential energy and Ee its elastic potential energy.
This does not happen in systems of particles charged with movement (since mechanical energy is transformed into electromagnetic), or in thermodynamic systems that undergo state changes (convert it into thermal energy) or in the mechanics of dissipative continuous media (in which energy dissipates due to deformations and heat generation).
Mechanical energy is frequently used to carry out specific work or convert it into other forms of energy, such as hydraulic energy , which takes advantage of the potential energy of the falling water; wind energy, which takes advantage of the kinetic energy of the wind, or tidal energy , which takes advantage of the kinetic energy of the tides.
There are two types of mechanical energy, as seen. These are:
Some possible examples of mechanical energy in its different forms are the following:
As already said, mechanical energy can be divided into two forms: kinetics (movement) and potential (form or position) .
The first is calculable using the simple formula of Ec = ½ m. v2 and its unit of measurement in the International System will be the Joules (J).
Instead, the potential energy is about the amount of energy stored in the system, due to its particular configuration or its positioning with respect to a gravitational or electromagnetic field, as the case may be. This energy is capable of becoming other forms of energy, such as kinetics itself.
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