An engineering team is testing an autonomous underwater glider during its ascent phase. The glider rises vertically through the water, and its onboard sensors log the height ascended from its launch depth at regular intervals of 10 seconds.
State two onboard instruments or sensors the glider must use to measure these physical quantities.
The table shows the glider's measurements during its ascent:
Time, t in sHeight ascended, h in m00101220223030403650406042\begin{array}{|c|c|} \hline \textbf{Time, } t \textbf{ in s} & \textbf{Height ascended, } h \textbf{ in m} \\ \hline 0 & 0 \\ \hline 10 & 12 \\ \hline 20 & 22 \\ \hline 30 & 30 \\ \hline 40 & 36 \\ \hline 50 & 40 \\ \hline 60 & 42 \\ \hline \end{array}Time, t in s0102030405060Height ascended, h in m0122230364042
Draw a graph of height ascended against time for this data on the grid provided below.
Using your graph, estimate how far the glider had ascended after 25 s.
Describe how the glider's vertical speed changed during the investigation.
What feature of your graph shows this change?
