The direction of the net electrostatic force is determined by the relative charges of the objects involved. Opposite charges attract each other, so the force will point towards the object with the opposite charge. Similar charges repel each other, so the force will point away from the object with the same charge.
The magnitude of the net electrostatic force is calculated using Coulomb's Law, which states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. The equation is F = k * (q1 * q2 / r^2), where F is the force, k is the Coulomb's constant, q1 and q2 are the charges of the objects, and r is the distance between them.
Yes, the direction of the net electrostatic force can change if the relative positions or charges of the objects involved change. For example, if one of the objects is moved closer to or farther from the other, the force vector will change accordingly.
The direction and magnitude of the net electrostatic force are affected by the charges of the objects involved, the distance between them, and the medium in which they are placed. The force is stronger for objects with larger charges and closer distances, and weaker for objects in a medium with higher dielectric constant.
The direction of the net electrostatic force is always parallel to the direction of the electric field. The magnitude of the net electrostatic force is equal to the product of the magnitude of the electric field and the charge of the object experiencing the force. In other words, the electric field represents the force per unit charge at any given point in space.