A 750-newton person stands in an elevator that is

accelerating downward. The upward force of the

elevator floor on the person must be

(1) equal to 0 N (3) equal to 750 N

(2) less than 750 N (4) greater than 750 N

When an elevator is accelerating downward, the normal force is equal to mg-ma (hence you feel a little lighter when accelerating downwards)

Therefore, the upward force of the elevator floor on the person must be less than 750N