Energy, Work and Power in physics.
Energy, Work and Power, some physical definitions
Energy, Work and Power are closely related physical quantities.
Energy
Energy is the capacity of a system to produce work. A system that has a certain energy will not do any work until that capacity is converted into motion. For example, an apple on a tree has a potential energy, but it does not do any work until it falls.
Its unit in the international system is the Joule (joule) which is the work done by a force of one newton whose point of application is displaced by one meter in the same direction.
Work
Work consists of a transfer of energy between systems. In the case of a force acting on a body, its work is equivalent to the energy required to move it. A force acting on a body is then said to do work when it causes a displacement of the body in the direction of the force. Therefore, in a mechanical system, if there is no displacement, the work is zero. This conclusion is not valid for thermodynamic systems, where heat transfers are considered as energy transfers.
![Trabajo de una fuerza](https://sicami.com/images/diagrama_trabajo_fuerza.png)
Work has the same units as energy.
Power
we can define power as the amount of work or energy use we perform in a given time. It is the speed at which we perform work or use energy.Units: watts.One watt of power is generated when work is done that consumes 1 Joule of energy during 1 second of time.. 1 w = 1 joule/ 1 segundo
![Power formula](https://sicami.com/images/power_formula.png)
Graphical interpretation of energy in the power chart
Graphically, energy is the area under the graph of power as a function of time:
![Grafica potencia y energía](https://sicami.com/images/grafica_potencia_energia.png)
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