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Conservation
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Was reading my old copy of Surely You're Joking Mr. Feynman again; ran into the anecdote about the Feynman sprinkler.
In the book, one guy argues that the water going into the sprinkler will cause the same centripetal force as the water going out of the sprinkler, causing a torque in the same directions for both cases. This results in the sprinkler accelerating in the same direction for both spraying and sucking.
However, Wikipedia says that an ideal Feynman sprinkler will accelerate "backwards;" can anyone tell me why the above argument was false?
PS: Apologies for misspelling Feynman. (Edit: corrected that for you. Friendly Admin.)
In the book, one guy argues that the water going into the sprinkler will cause the same centripetal force as the water going out of the sprinkler, causing a torque in the same directions for both cases. This results in the sprinkler accelerating in the same direction for both spraying and sucking.
However, Wikipedia says that an ideal Feynman sprinkler will accelerate "backwards;" can anyone tell me why the above argument was false?
PS: Apologies for misspelling Feynman. (Edit: corrected that for you. Friendly Admin.)
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