The air trapped under the hovercraft is used to provide the lift force by creating a cushion of pressurised air under the hovercraft.
What is friction?
Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.
The friction force prevents any two surfaces of objects from easily sliding over each other or slipping across one another. It depends upon the force applied to the object.
A hovercraft is machine used to uplift the heavy object by using the lift force of the air trapped under the hovercraftcraft used to provide the pressure that is utilised for the uplifting of the heavy bodies.
The layer of air trapped under the hovercraft provide the necessary cushion for the proper functioning of the hovercraft , the pressure of the trapped layer of air has slightly higher pressure than the atmospheric air.
Thus,the function of layer of air trapped under the hovercraft is to reduce the amount of friction when hovercraft provide movement and uplift object over rough surfaces.
Learn more about friction from here link given below
https://brainly.com/question/9753493
#SPJ2
