what is drag class 8

Drag is the force that opposes the motion of an object through a fluid, such as air or water. It arises due to the interaction between the surface of the object and the particles of the fluid, resulting in a frictional force that hinders the objects motion. Drag force can be influenced by factors such as the surface roughness of the object, the viscosity and density of the fluid, and the velocity of the object in the medium. Examples of drag force include the resistance experienced by a moving car due to air and the force acting on a swimmer as they move through water. To reduce drag on something moving through the air, one can use streamlined shapes, reduce surface roughness, and minimize the cross-sectional area of the object. In the context of class 8 science, understanding drag helps in comprehending the principles of fluid dynamics and the behavior of objects in different mediums.