The following statements describe parts of a vertical surveying mission undertaken by an autonomous underwater vehicle (AUV):
Phase 1: The AUV accelerates downward at a constant rate from 0 m/s to 2.5 m/s in 50 s.
Phase 2: The AUV descends at a constant velocity for 240 s.
Phase 3: The AUV decelerates downward at a constant rate, coming to a stop in 60 s.
During which phase of the mission is the resultant force on the AUV equal to zero?
A velocity-time graph of this mission is plotted with time in seconds on the horizontal axis and velocity in metres per second on the vertical axis. The line for Phase 1 starts at (0,0)(0, 0)(0,0) and ends at (50,2.5)(50, 2.5)(50,2.5). Describe the lines that must be drawn to complete the graph for Phase 2 and Phase 3, specifying their start and end coordinates.
Write down the equation which links acceleration, change in velocity, and time taken.
A different survey probe accelerates at 0.35 m/s2 for 40.0 s. Calculate the increase in velocity of this probe.