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How fast would you have to travel to be able to run on water?

There is no way we could run fast enough to run on water, say our readers, but there are many other ways to achieve this feat

2 November 2022

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Jonathan Knowles/Getty Images

How fast would you have to travel to be able to run on water?

Nick Canning
Coleraine, County Londonderry, UK

If I could hit a flat surface of water above a very deep trench at supersonic velocity, such that the impulse of my step was delivered in a time faster than the relaxation time of the water molecules, then the water surface would behave more like that of a solid than a liquid and I would bounce off it.

Unfortunately, humans can’t attain such power or reaction speeds. So, unless we use flippers with a large area to displace our…

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