Coulomb's Law describes the electrostatic force between two charged objects, dependent on the magnitude of charges and distance between them.

The force between charged objects, measured in Newtons (N).

The proportionality constant in Coulomb's Law, approximately 8.99 \times 10^9 N \cdot m^2/C^2.

The quantity of electric charge, measured in Coulombs (C).

The separation between two charges, measured in meters (m).

A visual representation of all forces acting on an object.

The vector sum of all forces acting on an object.

A state where the net force on an object is zero, resulting in no acceleration.

1. Isolate the object. 2. Identify all forces acting on the object (e.g., electric force, gravitational force, tension). 3. Represent each force with an arrow indicating magnitude and direction. 4. Label each force clearly.

Use Coulomb's Law: $F = k \frac{|q_1 q_2|}{r^2}$, where $F$ is the force, $k$ is Coulomb's constant, $q_1$ and $q_2$ are the charges, and $r$ is the distance between them.

Like charges repel, and opposite charges attract. If the result of Coulomb's Law is positive, the force is repulsive. If negative, it's attractive. The direction aligns with the line connecting the charges.

1. Draw a free-body diagram. 2. Calculate the magnitude and direction of each electric force. 3. Resolve forces into components. 4. Sum the components to find the net force in each direction. 5. Calculate the magnitude and direction of the net force.

The electrostatic force decreases by a factor of four.

The electrostatic force doubles.

The object is in equilibrium, either at rest or moving at a constant velocity.

The charge experiences a force in the direction of the electric field, causing it to accelerate in that direction (if free to move).

The charge experiences a force opposite to the direction of the electric field, causing it to accelerate in the opposite direction (if free to move).