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 ...

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.

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.