Question

Why eraser get smaller as we use it

Answer 1

The eraser gets smaller as we use it because when we rub eraser against a surface it produces friction which causes wear and tear of the object hence as we continue to rub eraser the friction produced causes tearing of the particles of the eraser eventually making it smaller.

Answer 2

The eraser gets smaller as we use it because when we rub eraser against a surface it produces friction which causes wear and tear of the object hence as we continue to rub eraser the friction produced causes tearing of the particles of the eraser eventually making it smaller