physics (making a yoyo)
posted by kelly .
I am required to make a yoyo that will unwind at a slowest rate possible, without using friction as a factor.
Will it help if I make it hollow, so it would have more rotational inertia?
Any other ideas? Please help!!

the smallest diameter spindle possible and the largest rotational inertia to weight ratio (i.e. a hollow center).
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