Ke Kānāwai Mua o Newton ʻōlelo ʻia e noho mālie ana kēlā me kēia mea e hoʻomaha ana a i ʻole ... a i ʻole e hoʻomaha ana ... berneʻe laina like e hoʻomau i ka neʻe ʻana ma kahi laina pololei ma kahi wikiwiki mau inā like ka ikaika holoʻokoʻa, ʻo ia hoʻi ka ikaika hopena e hana ana ma luna o ka mea, me ka ʻole. ʻO ka ʻōlelo makemakika o ke kānāwai mua o Newton:
E noʻonoʻo i kahi mea a puni ʻoe, e like me ka papa ʻaina, ka pōhaku, a i ʻole kekahi mea ʻē aʻe. E noho mālie ka papa ʻaina e hoʻomaha ana ke ʻole e neʻe ʻia a i ʻole e kau ʻia i kahi ikaika o waho, e like me ka paʻi a huki paha. Pēlā nō hoʻi no nā mea ʻē aʻe e hoʻomaha ana.
ʻAʻohe anei he ikaika e hana ana ma luna o kahi papaʻaina a i ʻole kahi pōhaku a i ʻole kekahi mea ʻē aʻe e hoʻomaha ana? Aia nā ikaika e hana ana ma luna o ka mea, akā ʻo ka huina o nā ikaika āpau e hana ana ma luna o ka mea a i ʻole ka ikaika hopena e like me ka ʻole. ʻO nā ikaika e hana ana ma luna o kahi mea e hoʻomaha ana, ʻo ia ka umekaumaha a me ka ikaika maʻamau . ʻO ke kuhikuhi o ka umekaumaha e kū pololei ana i ka honua i ke kikowaena o ka honua, ʻo ke kuhikuhi o ka ikaika maʻamau e kū pololei ana i ka honua. Ua like ka nui o kēia mau ikaika ʻelua akā ʻokoʻa ke kuhikuhi no laila ua like ka ikaika hopena me ka ʻole.
Pehea e pili ana i kahi mea e neʻe ana ma kahi laina pololei me ka wikiwiki mau? No ka hoʻomālamalama ʻana i kēia, e like me kāu e hoʻokuke aku ai i kahi mea, e like me kahi ʻāpana metala, ma luna o ka papahele. Ma hope o ka hoʻokuke ʻia ʻana, lohi ka ʻāpana a laila kū ma muli o ka friction . I mea e neʻe hou aku ai ka ʻāpana a i ʻole e neʻe no ka manawa lōʻihi, pono ʻoe e hoʻomaʻamaʻa i ka papahele a me ka ʻāpana. ʻO ka maʻalahi o ka papahele a me ka ʻāpana, ʻo ka mamao aku o ka neʻe ʻana o ka ʻāpana. Inā he maʻemaʻe loa ka papahele a me ka friction ʻole, e hoʻomau ka ʻāpana i ka neʻe ʻana a ʻaʻole e kū. ʻAʻole anei he ikaika e hana ana ma ka ʻāpana metala e neʻe ana ma kahi papahele maʻemaʻe loa? Aia nā ikaika e hana ana ma ka ʻāpana metala, ʻo ia hoʻi ke umekaumaha a me ka ikaika maʻamau. Hana kēia mau ikaika ʻelua i ke kū pololei a ʻaʻole e hoʻopilikia i ka neʻe ʻana o ka ʻāpana ma ke kuhikuhi ākea.
