Otro
Swimming in curved space
Autor
Raz, Oren
Avron, Joseph E
Resumen
Knowledge in geometry of curved spaces Baron von Munchausen claimed to have rescued himself from drowning in a swamp by pulling himself up by his hair. J. Wisdom noted that this is possibly not such a tall story if the Baron lived in a curved space, where it is possible to move without change in momentum. This is analogous to a cat turning without changing its angular momentum and landing on its feet. The swimmer in the demonstration uses only internal forces, but can still move by changing ψ and Φ , and then reversing the changes. Note that the same stroke leads to opposite swimming direction in the positively and negatively curved spaces Componente Curricular::Educação Superior::Ciências Exatas e da Terra::Física