Scientists claim that heavier, rather than flatter, rocks can produce ‘almighty’ leaps out of the water
Scientists have identified particular types of stone that can produce “almighty” leaps out of the water when skimmed across the surface.of the pursuit favour thin, flat stones for long-distance skimming, the researchers’ mathematical model reveals that heavier, potato-shaped stones can achieve more dramatic results, which blast the rock into the air.
Palmer and his colleague Frank Smith, a professor of applied mathematics at University College London, created the mathematical model to investigate how the shape and mass of an object affect how it skims on the surface of water. Beyond the crucial implications for stone throwing, the model will help scientists working on more commercial problems, such as the buildup of ice on aircraft at altitude, and the forces at play when planes land on water.
However, bulkier stones, even if thrown well, are not the sort to skip across the water a dozen or so times before disappearing beneath the surface. Heavier, more curved stones interact with the water in a different way, the scientists report in“If you’ve got a heavier rock, you can get a super-elastic response, where you get a single mega-bounce rather than lots of little bounces,” said Palmer. “There’s this almighty leap out of the water.
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