The origin of fire from friction

Light and heat on the earth come from the sun. In general, the proportion is favorable to the living creatures, but if excessive heat is stored in one place, flames will appear. Another factor that causes fire on earth is friction. Heat is released when two hard objects rub against each other. You may have seen sparks flying from the friction between the wheels and tracks of the train. Even when the branches of trees are constantly rubbing against each other due to strong winds, they get hot and burn. And there is a fire in the forest.

In ancient times, it was invented in ancient times to get fire by making a hole in a large piece of wood which needs fire for light or other need which is obtained only by human friction. When stones or hard metals rub or collide with each other, heat builds up and burns the surrounding objects. In the old days, two pieces of flint iron were rubbed close to Rs. In the old days, when lighters were made, iron stones used to come in them. It had a structure that ignited when the metal wheel rubbed against the stone and ignited the nearby cotton wool. The invention of the chandelier is also a method of obtaining fire by friction. Modern science has developed ways to get heat and energy from electricity.