What do you mean by central forces?

Explanation

### Step-by-Step Solution

1. **Definition of Central Forces**: Central forces are defined as forces whose magnitude depends on the distance between two objects. They act along the line connecting the centers of the two objects.

2. **Examples of Central Forces**:
- **Electrostatic Force**: For instance, the force between a proton and an electron is an attractive force due to their opposite charges. The magnitude of this force can be described by Coulomb's law:
\[
F = k \frac{|q_1 q_2|}{r^2}
...