* Friction: This is the force that resists motion between two surfaces in contact. It can be caused by irregularities on the surfaces (like sandpaper) or by the attraction between molecules (like in liquids).
* Air resistance: This is a type of friction that occurs when an object moves through air. The faster the object moves, the greater the air resistance.
* Gravity: This is the force of attraction between any two objects with mass. It pulls objects towards each other, and on Earth, it pulls objects downwards.
* Tension: This is the force that exists in a rope, string, or other flexible object when it is pulled tight. It can oppose motion by resisting stretching or pulling.
* Normal force: This is the force that a surface exerts on an object in contact with it. It acts perpendicular to the surface and can prevent an object from moving through it.
It's important to remember that forces don't stop motion; they change it. They can slow things down, change direction, or bring them to a complete stop.
