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 ...

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).

Since the human is standing on a flat surface and not accelerating vertically, the magnitude of the normal force is just equal to the person's weight (the human's mass multiplied by the ...

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