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Community Bot
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![enter image description here][1]enter image description here

What does this mean when E=U_eff? I don't think this means the first term in E is zero. I don't understand the sentence ' This is a cubic equation for cos(theta)' [1]: https://i.sstatic.net/2TTIx.jpg

![enter image description here][1]

What does this mean when E=U_eff? I don't think this means the first term in E is zero. I don't understand the sentence ' This is a cubic equation for cos(theta)' [1]: https://i.sstatic.net/2TTIx.jpg

enter image description here

What does this mean when E=U_eff? I don't think this means the first term in E is zero. I don't understand the sentence ' This is a cubic equation for cos(theta)'

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cykskmy
cykskmy
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Motion in a central field in Landau Mechanics

![enter image description here][1]

What does this mean when E=U_eff? I don't think this means the first term in E is zero. I don't understand the sentence ' This is a cubic equation for cos(theta)' [1]: https://i.sstatic.net/2TTIx.jpg