Greetings fellow physicists! I am stuck on a problem, please help. The situation is a block on a rough incline (trainglular block), the incline itself is on a frictionless table. A horizontal force is applied to the incline. The question is to find the minimum horizontal force needed so that the block starts to slide up the incline. This means the only friction force involved in this problem is static friction, and because the block will move up the incline this frictional force acts in the direction down the incline. When the horizontal force is applied to the incline the contact force between these two objects will increase, which is the normal force on the block, and thus the static friction force will increase until it reaches the maximum, and then the block will begin to move. Is this correct? I am having trouble finding a way for the block to move up the incline. There must be a force acting on the block in this direction, but what is it? The normal force is perpendicular to the block, its weight has a force component down the incline, and static friction acts down the incline (as the horizontal froce is being applied). Is this correct? I can't seem to find the force! Please help!!