- On a sunny day, set the barometer on a sidewalk and measure the height of the barometer and its shadow. Measure the building's shadow, apply the ratio.
- Drop the barometer from the roof, time its descent to the street and use s=.5*g*t^2.
- From the roof, tie the barometer to a string, lower it until it almost touches the street. Set it swinging and measure the period, and apply t=2*Pi*(L/g)^0.5
- Measure the height of the barometer, use the core stair to count
barometer heights to the top of the building, multiply.
- The easiest? Take the barometer to the building manager and say "I have a fine barometer here, and if you'll tell me the height of your building, I'll give it to you."
The top (and steady) speed reached by the elevator (a Schindler) was 7.9 m.p.h. The peak acceleration was about 0.8 m/s^2, less than 0.1 "g". And if my iPhone were as smart as it (and Steve Jobs) thinks it is, it could distinguish acceleration from gravity in a closed elevator cab. Oh, wait...