Question

a person weighing himself on a weighing machine kept in an elevator moving downward with an acceleration equal to the acceleration due to gravity what will be the reading of the weighing machine
PLEASE ANSWER CORRECTLY AND ONLY IF YOU ARE SURE​

Answer 1

Answer:

When a person stand on an elevator moving upwards with acceleration a, he will experience a downward gravitational force equal to mg and a downward pseudo force equal to ma.  

We know that a weighing machine measures the net downward force  

⇒F  

netdownwards

​  

=mg+ma

This means the net downward force exerted by the person on the weighing machine will increase by an amount ma and the apparent weight of the person will become more than his true weight

Answer 2

is less than their true weight

When a person stand on an elevator moving downwards with acceleration a, he will experience a downward gravitational force equal to mg and an upward pseudo force equal to ma.

We know that a weighing machine measuees the net downward force

⇒F

netdownwards

=mg−ma

This means the net downward force exerted by the person on the weighing machine will decrease by an amount ma and the apparent weight of the person will become less than his true weight