Question

Question #d4f09

Answer 1

When the elevator is rising with an acceleration `a=g`, acceleration due to gravity.

Explanation:

1. Elevator is at rest: the scale will read normal weight of the object, `W = mg`, where `m` is mass and `g` is acceleration due to gravity.

2. When the elevator is rising with an acceleration `a=g`:
   Scale will show that weight `W=m(g + g) = 2mg`.

3. When the elevator is moving down with an acceleration `a=-g`:
   Scale will show that weight `W=m(g - g) = 0`.