Frictional Force Direction
Frictional force acts in the opposite direction of the motion of the object. In this case, as the man is walking towards the east on a rough surface, the frictional force will act in the west direction.

Explanation
- Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact.
- When the man walks towards the east, his feet apply a force on the ground in the east direction.
- Due to the rough surface, the irregularities in the surface cause interlocking between the man's shoes and the ground.
- As a result, the ground exerts an equal and opposite force on the man's shoes in the west direction, which is the frictional force.
- This frictional force helps the man to push himself forward and prevents slipping on the rough surface.
- The magnitude of the frictional force depends on the nature of the surface and the normal force acting perpendicular to the surface.
In conclusion, as the man walks towards the east on a rough surface, the frictional force acts on him in the west direction, opposing his motion and providing stability.

It's opposite in the direction. so west