20, 37–38 [1905]. ISBN 978-0-486-60079-6. OntheHeavens, Book ii Chapter 14. Lloyd, G.E.R. Aristotle: The Growth and Structure of His Thought. Cambridge
with Tractatus Coislinianus, reconstruction of Poetics II, and the Fragments of theOnthe Poets, transl. by R. Janko, Indianapolis/Cambridge 1987 Aristotle:
奧雷姆用幾何方法證明了平均速度定理(英语:Mean speed theorem)。奧雷姆於1377年發表的著作《天地通論(英语:Treatise ontheHeavens and the World)》提出,當自由落體在加速時,其重量並沒有增加,而是衝力增加。假設,挖掘一條直線隧道,從地球表面的A點,穿過地心,挖