lubricant
Friction slows things down.
friction slows it down
Friction slows down the motion of objects.
it slows down the rocks
Friction
The type of friction that slows down a sliding object is kinetic friction. It occurs between two objects in contact when one (or both) of the objects is in motion. Kinetic friction opposes the direction of the object's motion, leading to a decrease in its speed.
friction
Drag.
Slows it down.
friction
Friction slows down objects by in some capacity rubbing against them
Kinetic friction slows down movement by opposing the relative motion between two surfaces in contact. It occurs when an object moves over another object or surface. The friction force depends on the nature of the materials and the force pressing the surfaces together.