# 9th Class Science Work and energy Transformation of Energy

## Transformation of Energy

Category : 9th Class

### Transformation of energy

The change of one form of energy into another is called transformation of energy. When a body falls from a certain height, its potential energy changes into kinetic energy.

Wind Energy $\to$ Electricity $\to$ Light + Heat

(1) A stone when is released from a height, the potential energy of the stone is gradually changed into kinetic energy and reverse happens when the stone is thrown upward.

On the other hand, when a body is thrown up, its kinetic energy gradually changes into potential energy.

(2) At a hydroelectric power house, the potential energy of water is transformed into kinetic energy and then into electrical energy.

(3) At a thermal power station, the chemical energy of coal is converted into heat energy which is further converted into electrical energy.

(4) Heat energy is converted into kinetic energy by the steam engine.

The Law of Conservation of Energy

According to the law of conservation of energy. Energy can neither be created nor destroyed, only it can be transformed from one form to another. But the total energy of the entire system always remains constant..

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