T − T L = J d ω d t + F ω {\displaystyle T-T_{L}=J{d\omega \over dt}+F\omega } in Laplace domain T ( s ) − T L ( s ) = J d ω ( s ) d t + F ω ( s ) {\displaystyle T(s)-T_{L}(s)=J{d\omega (s) \over dt}+F\omega (s)} (8)