1. Gravity (Fg): This force acts downwards, pulling the object towards the center of the Earth. It's directly proportional to the object's mass.
2. Normal Force (Fn): This force acts upwards, perpendicular to the surface, and is equal in magnitude but opposite in direction to the component of the object's weight perpendicular to the surface.
3. Friction (Ff): This force opposes the motion of the object, acting parallel to the surface in the opposite direction of the object's velocity. It can be static friction (when the object is at rest) or kinetic friction (when the object is moving).
4. Applied Force (Fa): This is the force that is being applied to the object to make it move. This could be a push, pull, or any other force that is directly acting on the object.
Let me know if you'd like a more detailed explanation of any of these forces!
