energy is the ability of something to do work, i.e, generate force in a particular body, substance or physical system.
Etymologically, this term derives from the Greek ergos, whose original meaning is literally “work”.
In physics, energy is associated with the ability of any body to produce work, action or movement.
The concept of energy is used figuratively to designate vigor, firmness and strength.
Example:"Do you still have the energy to run after so many hours of work?"
According to the laws of physics, energy cannot be created, but only transformed (first principle of Thermodynamics), with each type of energy capable of causing certain and characteristic phenomena in the physical systems.
The different energy sources can be found in nature and are basically classified into two categories, according to the possibility of their maintenance and production: the renewable energy (wind energy and solar energy, for example) and the non-renewable energies (from coal and oil, for example).
Learn more about the meaning of Renewable energy and of the Non-renewable energies.
forms of energy
- Kinetic energy: type of energy related to the movement of bodies;
- Thermal energy: form of energy related to heat and high temperatures;
- Solar energy: renewable alternative energy supply for various utilities by capturing the sun's rays;
- Wind Energy: alternative form of energy and that comes from the winds;
- Chemical Energy: type of energy that is stored in all materials with chemical bonds, and that is released when these bonds are broken or disturbed;
- Electricity: it can be produced from hydroelectric plants or through renewable sources such as solar and wind energy.
- Nuclear energy: energy released when a nuclear reaction occurs.
See too:
- Kinetic energy
- Thermal energy
- wind energy
- Chemical Energy
- Nuclear energy
