Energy
Energy is always conserved. It is never created or destroyed. Rather, energy is transferred or transformed from one form to another.
Here are the main types of energies that you need to know:
Conservation of energy
As mentioned above, energy is never created or destroyed – it is only transferred or transformed from one form to another. Here are some common simple examples:
- In a light bulb, electrical energy is transformed into heat energy and light energy
- In a water fall, gravitational energy is transformed into kinetic energy
- In a battery, chemical energy is transformed into electrical energy
The higher an object is from the earth, the greater it’s gravitational potential energy. In the waterfall example above, as the water falls from a higher area to a lower area, the gravitational energy decreases while the kinetic energy increases via the transformation of energy.
Kinetic energy & gravitation potential energy
Kinetic energy
The kinetic energy of a moving object can be calculated by the formula below:
Gravitational potential energy
The gravitational potential energy of an object above ground level can be calculated by the formula below:
Energy resources
Energy resources are used to produce electrical energy from other forms of energy
Efficiency
