ʻO ka ikaika maʻamau ka ikaika e hana ana ma luna o nā mea e pili ana, kahi e kū pololei ai ke kuhikuhi o ka ikaika i ka mokulele pili. ʻO kona hōʻailona ʻo N a ʻo ka ʻōnaehana honua o nā anakahi he kg m/s 2 a i ʻole Newton.
Hoʻoikaika iā N ma kahi pālahalaha
ʻO N ka ikaika i hoʻokomo ʻia e ka papahele ma luna o ke kaola, ʻo N' ka ikaika i hoʻokomo ʻia e ke kaola ma luna o ka papahele. ʻO w ka ikaika umekaumaha e hana ana ma luna o ke kaola a i ʻole ke kaumaha o ke kaola. ʻO N a me N' nā ikaika hana-pane, ʻoiai ʻo N a me w ʻaʻole nā ikaika hana-pane.
Inā kū ka poloka a ʻaʻole paha e neʻe ana i kahi kuhikuhi kū pololei, hiki ke helu ʻia ka nui o ka ikaika N me ka hoʻohana ʻana i ke kānāwai mua o Newton.
ΣF y = 0
N – w = 0
N = w
Inā e paʻi ʻia ka poloka i lalo me ka ikaika F e like me ke kiʻi ma ka ʻaoʻao, a laila ʻo ka nui o ka ikaika N penei:
ΣF y = 0
N – w – F = 0
N = w + F
Ka ikaika maʻamau ma kahi mokulele i hoʻohaʻahaʻa ʻia
ʻO N a me N' nā ikaika hana-pane. ʻO N ka ikaika maʻamau e hana ana ma ka poloka a ʻo N' ka ikaika maʻamau e hana ana ma ka mokulele inclined. ʻO W ka ʻāpana kū pololei o ka ikaika umekaumaha (w). Hana ka ikaika umekaumaha (w) ma ka poloka. ʻO ka nui o ka ikaika maʻamau
ΣF y = 0
N – w y = 0
N = w y = w cos theta
