A 64-kg woman lives at the top of a tall building and is riding an elevator to t

Question

A 64-kg woman lives at the top of a tall building and is riding an elevator to the bottom floor while standing on a bathroom scale. (a.) The elevator begins accelerating downward at 1.3 m/s^2. What would the bathroom scale read for the "weight" of the woman? (b.) After a few moments the elevator stops accelerating and continues downward at a constant velocity. What would the bathroom scale read now? (c.) At the end of the trip, the elevator slows down by having an upward accleration of 0.8 m/s^2. What would the scale read now?

Explanation / Answer

a)N=mg-ma =>N=544N weight on scale=544N m on scale=55.5kg b)N=mg N=627.2N weight on scale=627.2N m on scale=64kg c)N=mg+ma =678.4N weight on scale=678.4N m on scale=69.22kg

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