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Imagine the Universe (9th Edition)
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time_worksheet.txt
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2001-07-23
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Time that Period!
Student Worksheet
Name________________________________Date__________________Per./Mod______
1. Each student is responsible for creating a line plot of
amplitude of each swing vs. mean time it takes to make that
swing on his or her own graph paper.
2. Once you plot the data you have the "picture" of the period.
3. Your guess of that period is ... _______________
4. How would the results be different if instead of a string 30 cm
long, we used 10 cm string? _____________________________
_________________________________________________________
_________________________________________________________
How about a string 100 cm long? _________________________
_________________________________________________________
_________________________________________________________
5. Summarize the relationship that you may see with time or
swings and the use of different length string.
_________________________________________________________
_________________________________________________________
_________________________________________________________
_________________________________________________________
6. This relationship is actually defined by certain laws of
physics. These laws let us say that the period is equal to
2 x pi x SQRT( L / g)
where g is the acceleration due to gravity (here on Earth it has
a value of 9.8 m/sec^2.), L is the length of the pendulum string
from where it is tied at the top to where the center of mass is
of the tied object, and pi = 3.14.
Does your guessed period in question 3 confirm this? Prove
this by showing your work below.