Question: What is the center of mass of a system of particles?

Options:

1. The point where the total mass is concentrated
2. The average position of all particles
3. The point of maximum gravitational force
4. The point where all forces balance

Correct Answer: The average position of all particles

Solution:

The center of mass of a system of particles is defined as the average position of all the particles in the system, weighted by their masses.