Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Nkọwa: Newton's cannonball bụ nnwale echiche nke Isaac Newton ji mee ihe iji chepụta na ike ndọda bụ ihe zuru ụwa ọnụ, ọ bụkwa ya bụ isi ihe na-akpata ngagharị nke mbara ala. Ọ pụtara n'akwụkwọ ya bụ́ A Treatise of the System of the World.  Ajụjụ: Olee nnwale echiche Newton mere iji ruo ná nkwubi okwu ahụ bụ́ na ike ndọda bụ otu ihe n'ihe nile?
Ngwá agha Newton