What is the cause of friction, and in what direction does it act with respect to the motion of a sliding object?What is the cause of friction, and in what direction does it act with respect to the motion of a sliding objecFriction, only if mentioned, acts in the opposite direction of the object's motion. Friction is caused by the abbrasion between the object with the surface. The weight of the object and the force applied upon the object determine the friction that an object experiences.What is the cause of friction, and in what direction does it act with respect to the motion of a sliding objecFriction is actually caused by the Van der Waals forces between the atoms in the surface and the object that's moving. These are basically just attractive electromagnetic forces between the different atoms and molecules.
Frictional force is always in the opposite direction from the direction of motion.
The coefficient of friction (mu) is determined by the characteristics of the surface and the sliding (or rolling) object. The force of friction is equal to (mu) times N, where N is the normal (perpendicular to the sliding surface) component of the sliding object's weight.
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