You are standing on a scale in an elevator. suddenly you notice your weight decreases. what do you conclude? you are standing on a scale in an elevator. suddenly you notice your weight decreases. what do you conclude? the elevator is accelerating downwards. the elevator is accelerating upwards. the elevator is moving at a constant velocity upwards. your diet is working. the elevator is moving at a constant velocity downwards.
Imagine someone would cut the cable of the elevator. The elevator, the scale and the person inside would be in free fall and that person would be "weightless". So I would conclude the elevator is accelerating downwards.
