1. Type of Force:
- Coulomb's Law: Describes the electrostatic force between charged objects. This force can be attractive or repulsive, depending on the charges of the objects.
- Newton's Law of Gravitation: Describes the gravitational force between objects with mass. This force is always attractive.
2. Nature of the Force:
- Coulomb's Law: The electrostatic force is much stronger than the gravitational force.
- Newton's Law of Gravitation: The gravitational force is much weaker than the electrostatic force.
3. Dependence on Distance:
- Coulomb's Law: The electrostatic force decreases with the square of the distance between the charges.
- Newton's Law of Gravitation: The gravitational force also decreases with the square of the distance between the masses.
4. Involved Quantities:
- Coulomb's Law: The force depends on the magnitude of the charges and the distance between them. It is expressed as:
- F = k * (q1 * q2) / r²
where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance.
- Newton's Law of Gravitation: The force depends on the masses of the objects and the distance between them. It is expressed as:
- F = G * (m1 * m2) / r²
where F is the force, G is the gravitational constant, m1 and m2 are the masses, and r is the distance.
5. Field vs. Force:
- Coulomb's Law: Can be used to calculate the force between charges, and can also be used to find the electric field created by a charge distribution.
- Newton's Law of Gravitation: Primarily calculates the force of attraction between masses. It can also be used to find the gravitational field created by a mass distribution.
In Summary:
Coulomb's law governs the interaction between charged objects through the electrostatic force, while Newton's law of gravitation describes the interaction between massive objects through the gravitational force. Both laws follow an inverse square law dependence on distance but differ significantly in strength and the nature of the force.
