To solve this problem we will use Newton's second law in order to obtain the weight of a person. The second law tells us that
F = ma
Where,
m = mass
a = Acceleration
In this particular case, the acceleration is equal to that exerted by the earth through gravitational acceleration, so if the person's weight is 75Kg and the gravity is [tex]9.8m / s^2[/tex] , the weight of the body will be,
[tex]F_W =mg[/tex]
[tex]F_W = (75kg)(9.8m/s^2 )[/tex]
[tex]F_W = 735.75N[/tex]
When the elevator is at rest this reads 735.75N and 75Kg (The same mass of the person)
