A Chinook Salmon has a maximum underwater speed of 3.58 m/s, but it can jump out of water with a speed of 5.67 m/s. To move upstream past a waterfall, the salmon does not need to jump to the top of the fall, but only to a point in the fall where the water speed is less than 3.58 m/s; it can then swim up the fall for the remaining distance. Because the salmon must make forward progress in the water, let's assume that it can swim to the top if the water speed is 3.01 m/s. Assume water has a speed of 1.20 m/s as it passes over a ledge.
how high does the fish have to jump to swim up the waterfall?
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