1. A 650-N physics student stands on a metric bathroom scale inside an elevator. The elevator (including the student) has a total mass of 875 kg. Just after the elevator starts moving, the student checks the scale to find that it reads 550-N. A short time later, just before the elevator reaches its destination, the student again checks the scale, but now it reads 690-N.
(i) What is the acceleration (magnitude and direction) of the elevator at the time the scale read 550-N?
(ii) What is the acceleration of the elevator at the time the scale read 690-N?
(iii) What is the tension on the elevator cable in both cases?