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Old Sep 27th 2008, 09:44 PM   #1
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Join Date: Apr 2008
Location: HK
Posts: 886
Reaction force with different height

It is very lucky that I answer the question correctly. However, I don't know what's the relation in physics is used. Is that centriputal force? Conservation of energy?

What equation should I use?
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force, height, reaction

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