Final answer:
The increasing force between two moving particles signifies that they are both charged with like polarity (either both positive or negative), causing them to repel each other, in accordance with Coulomb's Law.
Step-by-step explanation:
Understanding Electrostatic Forces and Charge Movements
When two charged particles are released and the force on each particle increases as they move, it implies that their charges are of like nature, meaning both are either positive or negative. This scenario aligns with the principles of electrostatics, which state that like charges will repel each other and opposite charges will attract. According to Coulomb's Law, the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
The phenomenon described suggests that as the particles move farther apart, the force between them should decrease if only electrostatic forces are considered. However, if the force increases when they are moved closer together, this confirms that both particles possess charges with the same sign which causes them to repel each other with increasing force as the distance decreases. It's important to note that other forces, such as gravitational forces, may also play a role if the particles are massive.