Question: You are standing on a bathroom scale inside an elevator. Your weight is 140 lb, but the reading of the scale is 120 lb. (a)

You are standing on a bathroom scale inside an elevator. Your weight is 140 lb, but the reading of the scale is 120 lb.
(a) What is the magnitude and direction of the acceleration of the elevator?
(b) Can you tell whether the elevator is speeding up or slowing down?

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