How can I make a stone jump out of water?

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Discussion Overview

The discussion revolves around the phenomenon of skipping stones on water, specifically the conditions required for a stone to jump out of the water multiple times. Participants explore factors such as speed, angle, and surface tension, while seeking to understand the mechanics behind this behavior.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that the ability of a stone to skip on water is due to the surface tension of water and inquires about the necessary speed and angle for optimal skipping.
  • Another participant references an article from the American Journal of Physics regarding skipping stones, although they have not read it yet.
  • A claim is made that a throwing angle of 20 degrees, a speed of 12 m/s, and a rotational speed of 14 rev/sec are required for the stone to jump on water.
  • A different participant challenges the initial assertion that surface tension is the reason for the stone's ability to skip, implying that this explanation is incorrect.

Areas of Agreement / Disagreement

Participants express differing views on the role of surface tension in the phenomenon, with some supporting its significance while others contest this explanation. The discussion remains unresolved regarding the precise mechanics involved.

Contextual Notes

There are unresolved questions about the specific values of surface tension and how they relate to the mechanics of stone skipping. Additionally, the assumptions behind the claimed speeds and angles are not fully explored.

ngkamsengpeter
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I have seen many of these phenomenon before that is when someone throw a stone to the water , the stone can jump out of water for several times before it drop to the water . I know it is due to surface tension of water .How do I know that what speed and what angle I need to throw the stone in order for it to jump from the water and what is the value of surface tension of water ?
 
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it is found that, a angle of 20 degree between the stone nd water,
a speed of 12 m/s
a rotational speed of 14 rev/sec of the stone, is necessary to jump on water..
 
ngkamsengpeter said:
I have seen many of these phenomenon before that is when someone throw a stone to the water , the stone can jump out of water for several times before it drop to the water . I know it is due to surface tension of water .How do I know that what speed and what angle I need to throw the stone in order for it to jump from the water and what is the value of surface tension of water ?

That is not true, it is not because of the surface tension.
 
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