Here's why:
* Support Force: This force is the upward force exerted by the surface to counteract the object's weight. It's often called the normal force.
* Surface: The surface the object rests on.
* Perpendicular: The support force always acts perpendicular to the surface.
Think of it this way: if the surface is horizontal, the support force points straight upwards. If the surface is tilted, the support force still acts perpendicular to that tilted surface.
This perpendicular relationship is crucial because it ensures the object remains at rest and doesn't slide down the surface due to gravity.
