TWO very confusing questions that I need answers to: ..........

Re: TWO very confusing questions that I need answers to: …

It’s newton’s third law of motion in action. Every action has an equal and opposite reaction. Your weight is nothing but the reaction of the ground ON you due to the action (gravity) of you ON the ground. If you and the weight machine fell freely at the same acceleration (9.8 m/s^2), then the weight machine would not register any reading. Similarly, you cannot gain any upward reaction from the suitcase, since you and the suitcase (analogy to weight machine) are falling freely with similar accelration, namely 9.81 m/s^2.