Two bodies are projected from the top of a tower in opposite directions with velocities of $u_1$ and $u_2$ simultaneously. Find the time when their velocities are mutually perpendicular.

Q. Two bodies are projected from the top of a tower in opposite directions with velocities of $u_1$ and $u_2$ simultaneously. Find the time interval when their
i) velocities are mutually perpendicular
ii) displacements are mutually perpendicular.

Q. Two bodies are projected from the top of a tower in opposite directions with velocities of $u_1$ and $u_2$ simultaneously. Find the time when their velocities are mutually perpendicular.

Q. Two bodies are projected from the top of a tower in opposite directions with velocities of $u_1$ and $u_2$ simultaneously. Find the time interval when their
i) velocities are mutually perpendicular
ii) displacements are mutually perpendicular.

Q. Two particles are projected from the top of a tower with velocities $10\text{m/s}$ and $80\text{m/s}$ in horizontal but in opposite directions. After what time $t$ their velocity vectors will be mutually perpendicular to each other? (Take $g=10{\text{m/s}}^2$)

Q. Two particles are projected from the top of a tower with velocities $20m/s$ and $80m/s$ in horizontal but in opposite directions. After what time $t$ their velocity vectors will be mutually perpendicular to each other? (Take $g=10m/s^2$)