Question

WE KNOW THAT WHEN WE STAND IN A LIFT WE FEEL LIGHT WHEN THE LIFT STARTS A DOWNWARD MOTION AND WE FEEL HEAVY WHEN THE LIFT MOVES DOWNWARD,WHAT WILL IF THE LIFT MOVES VERY FAST IN THE DOWNARD DIRECTION AND WEIGHT DECREASES TO NEGATIVE AND WHAT IF THE LIFT MOVES VERY FAST IN THE UPWARD DIRECTION AND OUR WEIGHT A LOT . THE QUESTION IS WHAT WILL HAPPEN TO US?

Answer 1

$$\begin{gathered} \mathrm{Case}\mathrm{I}:(\mathrm{Lift}\mathrm{moving}\mathrm{down}) \\ \mathrm{Apparent}\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{person}\mathrm{decreases}. \\ \mathrm{Case}\mathrm{II}:(\mathrm{Lift}\mathrm{moving}\mathrm{up}) \\ \mathrm{Apparent}\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{person}\mathrm{increases}. \\ \mathrm{Case}\mathrm{III}:(\mathrm{Lift}\mathrm{moving}\mathrm{down}\mathrm{very}\mathrm{fast}) \\ \mathrm{Apparent}\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{person}\mathrm{decreases}\mathrm{to}\mathrm{negative},\mathrm{which}\mathrm{means}\mathrm{his}\mathrm{weight}\mathrm{acts} \\ \mathrm{up}\mathrm{instead}\mathrm{of}\mathrm{down}. \\ \mathrm{Case}\mathrm{IV}:(\mathrm{Lift}\mathrm{moving}\mathrm{up}\mathrm{very}\mathrm{fast}) \\ \mathrm{Apparent}\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{person}\mathrm{increases}\mathrm{to}\mathrm{high}\mathrm{positive}. \\ \mathrm{In}\mathrm{all}\mathrm{the}\mathrm{above}\mathrm{cases},\mathrm{the}\mathrm{mass}\mathrm{of}\mathrm{the}\mathrm{person}\mathrm{remains}\mathrm{constant}. \\ \mathrm{Only}\mathrm{apparent}\mathrm{weight},\mathrm{that}\mathrm{is},\mathrm{the}\mathrm{force}\mathrm{with}\mathrm{which}\mathrm{he}\mathrm{press}\mathrm{the}\mathrm{base} \\ \mathrm{of}\mathrm{the}\mathrm{lift}\mathrm{changes}. \end{gathered}$$