What Is the Elevator's Z Acceleration When Your Apparent Weight Is Half?

[gtaylor]

Imagine that you are standing on a scale in an elevator and you find that your apparent weight as read by the scale is half your real weight. What is the elevator's z acceleration az relative to the ground? Express you answer as a multiple of g, and make sure that your value for az has the correct sign.

 

[kuruman]

Draw a free body diagram and write down Newton's Second Law. Go for it.