Kale munaphunzira lamulo lachiwiri la Newton lomwe limafotokozedwa kudzera mu equation iyi:
Chiganizochi chikufotokoza ubale womwe ulipo pakati pa mphamvu yochokera, yomwe imadziwikanso kuti mphamvu yeniyeni, ndi kulemera ndi kufulumira. Mphamvu yochokerayo yomwe imagwira ntchito pa chinthu chokhala ndi kulemera imapangitsa chinthucho kufulumira.
Nthawi ino tipereka mtundu wina wa lamulo lachiwiri la Newton, lomwe limafotokoza ubale pakati pa mphamvu yochokerapo ndi kusintha kwa mphamvu.
Ngati pali mphamvu yochokera pa chinthu chomwe chili pamalo oyamba ndiye kuti chinthucho chimayenda. Chinthucho chisanasunthe, sichikhala ndi mphamvu. Chikasuntha, chinthucho chimakhala ndi mphamvu. Tinganene kuti mphamvu yochokera pa chinthucho imapangitsa kuti mphamvu ya chinthucho isinthe pakapita nthawi inayake. Mwanjira ina, liwiro la kusintha kwa mphamvu ya chinthucho ndi lofanana ndi mphamvu yochokera pa chinthucho.
Equation 1.1 ndi mtundu wina wa lamulo lachiwiri la Newton, lomwe limafotokoza ubale pakati pa mphamvu yochokerapo ndi kuchuluka kwa kusintha kwa mphamvu ya chinthu, pamene kulemera kwa chinthucho kumakhalabe kosasintha komanso pamene kulemera kwa chinthucho kumasintha.
Equation 1.2 ndi equation yachiwiri ya lamulo la Newton yomwe imafotokoza ubale womwe ulipo pakati pa mphamvu yochokera ndi kufulumizitsa zinthu zomwe zimakhala ndi kulemera kosalekeza zimakumana nazo.
