You are riding the elevator in a tall building. To measure the acceleration of the elevator you take the scale with you and stand on it. Your weight at rest is 700 N but when you press the UP button your scale momentarily shows your weight 800 N and then goes back to 700 N. What is the acceleration of the elevator when it starts going up?

You are riding the elevator in a tall building. To measure the acceleration of the elevator you take the scale with you and stand on it. Your weight at rest is 700 N but when you press the UP button your scale momentarily shows your weight 800 N and then goes back to 700 N. What is the acceleration of the elevator when it starts going up?