Apparent weight can be negative ?? If yes then what conditions are required for this ? If we change the frame of reference is there any change occur in apparent weight due to these changes ?

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    $\begingroup$ Maybe apparent weight can be negative if you are in an elevator which is accelerating upwards at 2g. $\endgroup$ – physics2000 Mar 22 '18 at 17:20
  • $\begingroup$ If we change the frame of reference and reduced the downward force to almost zero and increases upward force than apparent weight b negative ?? $\endgroup$ – Fatima Mar 22 '18 at 17:22
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    $\begingroup$ what do you mean by downward force and upward force in this context? $\endgroup$ – physics2000 Mar 22 '18 at 17:23
  • $\begingroup$ Weight is always a downward force as it always due to gravity.. But if the upthurst of it is greater than its weight then what will b happened ? $\endgroup$ – Fatima Mar 22 '18 at 17:32
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    $\begingroup$ this is exactly what I said in my first comment. You will feel an upward force equal to g but if you stand on a scale the scale will register as 2g( suppose your weight is 20 KG then the weighing scale on the elevator going upward with 2g acceleration will register as 40 KG) $\endgroup$ – physics2000 Mar 22 '18 at 17:39

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