Is this a good way of explaining this then?
Zero gravity can now be manipulated on Earth similar to the way someone in freefall. Think of yourself sitting on a chair: the chair exerts an equal amount of force you push it with. You can feel the force for example from how your abdominal muscles...
Ok, I have to do my case study on zero gravity but I am just not understanding it. It says weightlessness is similar to when you are in a free fall, for example in an elevator because you are accelerating at gravity's force? I don't get what EXACTLY makes us weightless just because we are free...