(10-14)
d d t ( m 0 α d x d t ) = F x , {\displaystyle {\dfrac {d}{dt}}\!\left({\dfrac {m_{0}}{\alpha }}{\dfrac {dx}{dt}}\right)=\mathrm {F} _{x},\;} d d t ( m 0 α d y d t ) = F y , {\displaystyle {\dfrac {d}{dt}}\!\left({\dfrac {m_{0}}{\alpha }}{\dfrac {dy}{dt}}\right)=\mathrm {F} _{y},\;} d d t ( m 0 α d z d t ) = F z , {\displaystyle {\dfrac {d}{dt}}\!\left({\dfrac {m_{0}}{\alpha }}{\dfrac {dz}{dt}}\right)=\mathrm {F} _{z},\;}