Download Now (312 kb)Yo-Yos
Yo!
I'm John, and I love yo-yos! When my friends Kevin, Minna and I
are doing tricks, one of the most important skills to master is
making our yo-yos "sleep." Sleeping is when you throw
the yo-yo just right, and it keeps spinning when it reaches the
end of the string without climbing back up. Since we want to perfect
our tricks, we asked this question on DragonflyTV: How does the length of the yo-yo string affect its "sleeping time?"
How would you investigate this question?
How can we change our yo-yos to increase their "sleeping time?" Look
at several kinds of yo-yos. Some have ball bearings, others do
not. Pick one kind of yo-yo, the variables you want to investigate,
and describe what experiments you'd do. Write your investigation
in your notebook or go to Yo-Yos to find out what John and his
friends did.
