When you rub an eraser against paper, the friction between the two surfaces creates heat. This heat helps to soften the graphite particles, making them easier to remove. The eraser also picks up some of the paper fibers, which help to further dislodge the graphite. The resulting mixture of graphite particles and paper fibers is called eraser dust.
As you continue to rub the eraser, more and more eraser dust is created. Eventually, all of the graphite is removed from the paper, and the eraser mark is erased.
Here is a more detailed explanation of the science behind how erasers work:
* Friction: When you rub an eraser against paper, the friction between the two surfaces creates heat. This heat helps to soften the graphite particles, making them easier to remove.
* Adhesion: The eraser is made of a soft material, such as rubber or plastic, that is able to grip onto the graphite particles and pull them off the paper.
* Binding agent: The eraser also contains a binding agent, such as clay, which helps to hold the eraser together and prevent it from crumbling.
* Eraser dust: The resulting mixture of graphite particles and paper fibers is called eraser dust.
By combining these four forces, erasers are able to effectively remove pencil marks from paper.
