He ture pūtaiao tēnei i tūhuratia e Tā Isaac Niutana i te rautau 17, e mea ana:
A scientific law which was investigated by Sir Isaac Newton in the 17th century which states:
He aha tā te ture neke tuarua a Niutana mō te taumaha o te motukā e haere ana i te huarahi me te ātete o te hau e pupuhi ana?
Ki tā te ture neke tuarua a Niutana, kāore e pērā rawa te tawhiti o te rere o te pōro taumaha i tō te pōro taimāmā mēnā he ōrite te kaha o te whana.
Rangahautia ētahi pūāhua e whakatauira ana i te ture neke tuarua a Niutana.