We drop a stone from a tower that is $76 \mathrm{~m}$ high. At the moment of the drop, a shooter at the base of the tower aims at the stone; the upper end of the gun barrel is $2.1 \mathrm{~m}$ above the base of the tower and the initial speed of the bullet is $65.6 \frac{\mathrm{m}}{\mathrm{sec}}$. When and at what height will the bullet hit the stone: 

${ }^{1}$ The acceleration due to free fall: $g=980.8 \frac{\mathrm{cm}}{\mathrm{sec}^{2}}$ (according to Gruber's determination in Budapest, $g=980.837 \frac{\mathrm{cm}}{\mathrm{sec}^{2}}$ ).
$$
t=1.13 \mathrm{sec} \quad s=67.67 \mathrm{~m}
$$