* They must have opposite charges. Attraction between charged objects occurs when one object has a positive charge and the other has a negative charge.
Why this works:
* Electric Force: Charges exert a force on each other. This force is attractive between opposite charges and repulsive between like charges.
* Opposites Attract: The opposite nature of the charges means they "want" to come together to neutralize each other.
Important Note: If the two objects are neutral, they might also attract due to other forces like Van der Waals forces, but that's a different type of attraction.
