1. Gravity: This is the force of attraction between any two objects with mass. It's what keeps us on the ground and what causes the planets to orbit the sun.

2. Friction: This is a force that opposes motion between two surfaces in contact. For example, the friction between your shoes and the ground helps you walk, and the friction between a car's tires and the road helps it stop.

3. Electromagnetic Force: This is the force that governs the interaction of charged particles. It's responsible for things like electricity, magnetism, and light.