Lift: Lift is the force that opposes gravity and keeps the hovercraft in the air. It is generated by the pressure difference between the top and bottom of the craft. The fans on the hovercraft suck in air from the top and blow it out the bottom, creating a high-pressure area above the craft and a low-pressure area below. This difference in pressure creates lift.

Thrust: Thrust is the force that propels the hovercraft forward or backward. It is generated by the fans on the hovercraft. The fans suck in air from the front and blow it out the back, creating a high-pressure area behind the craft and a low-pressure area in front. This difference in pressure creates thrust.

Drag: Drag is the force that opposes the motion of the hovercraft. It is generated by the friction between the air and the hovercraft. The faster the hovercraft goes, the more drag it experiences.

Gravity: Gravity is the force that pulls the hovercraft down to the ground. It is always present, but it is counteracted by the lift generated by the fans.