Kâ-suk-thu

Tu Vu̍t-lí-ho̍k, kâ-suk-thu he Suk-thu ke pien-fa-li̍t. Su-ho̍k ke kóng-fap chhiu-he suk-thu chho̍k Sṳ̀-kiên ke mì-fûn (derivative). Iá he it-chúng Chhòng-thu/sṳ̀-kiên² ke Hiong-liong, tu SI iung mî méu-chûng kit-tô mí lòi péu-sṳ, siá-cho m/s².

$a={\frac {dv}{dt}}$

$a$ péu-sṳ kâ-suk-thu, $v$ péu-sṳ suk-thu, $t$ he sṳ̀-kiên.