In this simulation, you will observe the behavior of a block on a ramp. When working with such a case, you identify the forces that are parallel to the ramp and cause the motion down the ramp and the forces which are perpendicular to the ramp.

What are the forces on the block? In the image below, there are two forces on the block.One is the force due to gravity (=mg) and the normal force n which is perpendicular to the incline and reflects the force applied by the ramp to support the block on the incline.