P2) Since the Earth is not a perfect sphere, the valueof g on the Earth’s surfac
ID: 1674687 • Letter: P
Question
P2) Since the Earth is not a perfect sphere, the valueof g on the Earth’s surface varies over its surface, from 9.78 m/s2 at the equator to 9.83 m/s2at the poles. A pendulum whose length is 1.000 m can be used to measure g. Such adevice is called a gravimeter. a. How long do 100.0 oscillations take at theequator? b. How long do 100.0 oscillations take at thepoles? c. Is the difference between these timesmeasurable with a hand-held stopwatch? d. Suppose you take your gravimeter to the top ofMount Chimborazo and you find that 100 oscillations take 201.0 s. What is ghere?P2) Since the Earth is not a perfect sphere, the valueof g on the Earth’s surface varies over its surface, from 9.78 m/s2 at the equator to 9.83 m/s2at the poles. A pendulum whose length is 1.000 m can be used to measure g. Such adevice is called a gravimeter. a. How long do 100.0 oscillations take at theequator? b. How long do 100.0 oscillations take at thepoles? c. Is the difference between these timesmeasurable with a hand-held stopwatch? d. Suppose you take your gravimeter to the top ofMount Chimborazo and you find that 100 oscillations take 201.0 s. What is ghere?
Explanation / Answer
a.) 1 oscillation takes 2(1/9.78) seconds=2.009seconds so 100 takes 200.9 seconds b.) use same logic but use other gravity value c.) compare the two answers and write what you think d.) just do the reverse solve for g (g=L /(T/2)2)
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