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Name: Nicole S.
Status: student
Age: 18
Location: N/A
Country: N/A
Date: Thursday, June 06, 2002


Question:
How does the toy, Hula Hoop work?


Replies:
Nicole,

A hula hoop works very much like a rock on a string. The center of mass of the hula hoop corresponds with the rock. Where your hip makes contact with the hoop corresponds with where your hand holds the string. I cannot explain much further without diagrams. I am not very good at making such diagrams in e-mail messages. Your text may show the force vectors for a rock on a string even if it doesn't talk about a hula hoop. The ideas are the same.

Dr. Ken Mellendorf
Physics Instructor
Illinois Central College



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