👉 Frictionless or friction-free refers to a state of complete absence of friction between two objects in motion, typically described as the absence of any resistance or opposing forces acting on an object. This concept is fundamental to understanding the behavior and interaction of objects in various contexts such as transportation, movement, and energy transfer. In physics, frictionlessness means that there are no external forces (such as gravity) acting upon an object during its motion. The presence of friction reduces the kinetic energy of an object,

frictionlessness