Friction type when a body is already moving Identify the correct term for the frictional force acting on a body while it is in motion relative to the surface. Choose the correct option.

Given dataThe body is already in motion relative to the contact surface.

Concept/ApproachFriction is categorized by the motion state: static (no slip), limiting (maximum static, just before slip), kinetic/dynamic (during sliding), and rolling (during rolling contact).

Step-by-stepMotion is occurring ⇒ sliding friction applies.Sliding friction is also called kinetic or dynamic friction.

Common pitfallsConfusing limiting friction (threshold of motion) or static friction (no slip) with the friction during sliding.

Final Answerdynamic friction