Ko te kaha o te rauemi he tiketike, he nui te ahotea tangential me te deformation kirihou he nui i roto i te tapahi, na he nui te kaha tapahi.I tua atu, he tino rawakore te kawe i te waiariki o te rauemi, na te mea ka piki ake te wera o te tapahi, a ko te teitei o te pāmahana he maha tonu te aro ki te waahi whaiti me te roa e tata ana ki te tapahi tapahi, na reira ka tere ake te kakahu o te taputapu tapahi.