- Homework Statement:
- All the surfaces shown are rough and the system is in equilibrium. The direction of friction on B due to A is-
- Relevant Equations:
This problem is similar to what I have done before here. I think since the system is in equilibrium, that is both bodies are at rest, net force on each should be zero. So to balance the forces in all directions we need only friction forces on each in upward direction. So the force on B due to A is upwards.