6 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]{9eab8ba4-d97b-4e3a-b36d-53f4bc7a80c2-4_233_959_482_575}
\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.