An automated research drone is hovering at a fixed height above a canyon floor. It releases sensor probes vertically downwards from rest at regular intervals of 0.80 s0.80\text{ s}0.80 s. The probes fall freely under gravity.
The first probe hits the canyon floor after falling a distance of 19.6 m19.6\text{ m}19.6 m.
Find the distance fallen by the second probe at the instant the first probe hits the canyon floor.
[Take g=9.8 m s−2g = 9.8\text{ m s}^{-2}g=9.8 m s−2.]
