and when the lift is moving up with constant acceleration
\({t_2} = \sqrt {\frac{{2h}}{{g + a}}} \)
\(\therefore \;\;{t_1} > {t_2}\)
[$\sin \left(35^{\circ}\right)=0.573, \cos \left(35^{\circ}\right)=0.819$ $\left.\sin \left(110^{\circ}\right)=0.939, \cos \left(110^{\circ}\right)=-0.342\right]$