Subject: How to build a yoyo with a maximum return height

Date: Fri Dec 26 10:35:46 2003
Posted by No name entered.
Grade level: 10-12 School: No school entered.
City: No city entered. State/Province: No state entered. Country: No country entered.
Area of science: Physics
ID: 1072456546.Ph
Message:
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As a school project, we were asked to design and build a yoyo that would have a
maximum return height once dropped.  The yoyo will be attached to a 10m string,
and released from a given height, and once it reaches the bottom it must return
as high as possible, without any added tugs from the person dropping the yoyo.
I would just like to know if there are tips of things to look out for when
building this yoyo.  Also, I have been unable to determine the maximum amount
of tension that the string can take before breaking.  This information would be
useful for determining how much mass my yoyo can have before it actually breaks
the string.  The reason for this complication is that I would probably need to
take into account the velocity of the yoyo at the bottom of the string, and the
force that it will apply at the very bottom.  Unfortunately, I am not sure how
to do this, or what equation to use; any help would be greatly appreciated.

PS. We are not allowed the use of any springs, or other things to store
potential energy.  We must stick to the basic yoyo and string design.

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Re: How to build a yoyo with a maximum return height

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