A spy in a speed boat is being chased down a
river by government officials in a faster craft.
Just as the officials’ boat pulls up next to the
spy’s boat, both boats reach the edge of a 5.4
m waterfall. The spy’s speed is 13 m/s and
the officials’ speed is 26 m/s.
How far apart will the two vessels be when
they land below the waterfall? The accelera-
tion of gravity is 9.81 m/s2 .
Answer in units of m


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