G = ( x G , y G ) = ( 0 , v 0 a ( c o s h a t − l ) ) {\displaystyle {\begin{aligned}G{\rm {=\ }}\left(x_{G}{\rm {\ ,\ }}y_{G}\right){\rm {=}}\left({\rm {0,\ }}{\frac {v_{0}}{a}}\left({\rm {\ cosh\ }}at-{\rm {l}}\right)\right)\end{aligned}}}
