In this model, the force is less than or equal to the product of some coefficient (that depends on the two types of surfaces) and the normal force (how hard the two surfaces are pushed together).

You also ignore air resistance, which only leaves the downward gravitational force and the normal force (the upward pushing force from the ice), which balance each other out. No net force means no ...

Abstract: Delamination of rigid objects from an elastic substrate with finite thickness is a fundamental problem underlying applications such as marine fouling release coatings or anti-icing coatings.

Notice that there only two forces acting on the human (the red circle at the top). There is the gravitational force pulling down and the seat (the normal force) pushing up.

At this point, your body feels “lighter” because the force of gravity and the normal force, of your seat, are working in opposite directions.