Posted by **kate** on Sunday, June 19, 2011 at 9:24pm.

Zach, whose mass is 67 kg, is in an elevator descending at 12 m/s. The elevator takes 3.5 s to brake to a stop at the first floor.

(a) What is Zach's apparent weight before the elevator starts braking?

(b) What is Zach's apparent weight while the elevator is braking?

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