5 Ali is throwing flat stones onto water, hoping that they will bounce, as illustrated in Fig. 5.
Ali throws one stone from a height of 1.225 m above the water with initial speed \(20 \mathrm {~ms} ^ { - 1 }\) in a horizontal direction. Air resistance should be neglected.
\begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{13f555cc-d506-48e5-a0e4-225cae4251dc-5_229_953_434_557}
\captionsetup{labelformat=empty}
\caption{Fig. 5}
\end{figure}
- Find the time it takes for the stone to reach the water.
- Find the speed of the stone when it reaches the water and the angle its trajectory makes with the horizontal at this time.