Frictional force acts in

The same direction as the motion
The opposite direction of the motion
All the directions
Upward direction
The opposite direction of the motion  The part which is tangent to the contacting surfaces is called the frictional force. Friction is a resisting force that acts on a body to prevent or retard its motion. Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion.

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