Block on a Frictionless Inclined Plane

Drag the top corner of the plane to vary its steepness. As the steepness increases, so does the magnitude of the net force. This is why a block slides more quickly down a steep plane than a gradual one.

The net force on the block is the vector sum of the gravitational force, due to the attraction between the block and the earth, and the normal force, which the inclined plane exerts on the block in a direction perpendicular to the plane.