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The earth’s free-fall acceleration varies from 9.780 m/s2 at the equator to 9.832 m/s2 at the poles. A pendulum whose length is precisely 1.000 m can be used to measure g. Such a device is called a gravimeter.
a. How long do 100 oscillations take at the equator?
b. How long do 100 oscillations take at the north pole?
c. Suppose you take your gravimeter to the top of a high mountain peak near the equator. There you find that 100 oscillations take 201 s. What is g on the mountain top?
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