Ka ikaika maʻamau ʻo ia 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 ʻōnaehana honua o nā ʻāpana ʻo kg m/s2 a i ʻole ʻo Newton.
Hoʻoikaika iā N ma kahi pālahalaha
ʻO N ka ikaika i hoʻokau ʻia e ka papahele ma luna o ke kaola, ʻo N' ka ikaika i hoʻokau ʻia e ke kaola ma luna o ka papahele. ʻo w ka ikaika umekaumaha e hana ana ma ka poloka a i ʻole ke kaumaha o ka poloka. ʻO N a me N' nā hopena hana, ʻoiai ʻaʻole ʻo N a me w. ka ikaika pane hana.
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.
ΣFy = 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:
ΣFy = 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
ΣFy = 0
N - wy = 0
N = wy = w cos theta
