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Scientists Build Underwater Jumping Robot

JacksinPA

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https://www.popularmechanics.com/te...05/scientists-build-underwater-jumping-robot/

The robot is designed to understand how animals like whales and dolphins breach the water's surface.


Few sights in nature are majestic as a whale or dolphin jumping out of the water, but these graceful-looking maneuvers are technically challenging to pull off. So a group of researchers set out to understand how jumping out of the water actually works by building a robot to do it.

The researchers, from Cornell University, studied simpler and more common animals like frogs and small crustaceans that perform a breaching maneuver. These smaller animals tend to breach either to catch prey or to escape from predators, and their small size and predictable behavior makes them ideal study subjects.
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The simple design - a hinge & a rubber band - takes advantage of 'entrained water mass,' which is expelled in order to act as Newton's law & thereby provide the upward thrust.
 
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