Which friction occurs as an object moves through a fluid?

Fluid friction, also known as drag, occurs when an object moves through a fluid, which can be a liquid or gas. This type of friction arises from the interaction between the surface of the object and the fluid particles, resulting in resistance to the motion. The amount of fluid friction depends on several factors, including the speed of the object, the viscosity of the fluid, and the surface area of the object in contact with the fluid.

In scenarios where an object is moving through a fluid, such as a boat in water or an airplane in the air, the resistance that the object faces is attributed to fluid friction. This concept is vital in understanding how different materials and shapes can impact the performance and efficiency of moving objects through fluids.

Static friction, on the other hand, applies to objects at rest and prevents them from starting to move, while kinetic friction refers to the friction that acts on moving objects in contact with solid surfaces. Rolling friction pertains to the resistance encountered when an object rolls over a surface, which is distinctly different from fluid interactions. Therefore, fluid friction is the most applicable term for the friction occurring during the movement of an object through a fluid.