111 stones of various shapes and mass rolled in summer along the Swiss Alps in a study of movement patterns.
Ready to roll off the cliff.
There was a researcher at the Research Institute WSL systematically followed the various stones road when they were rolled performs cliffs in the Alps. Stones shape varied from round to cubical and mass between 25 and 80 kg.
In each stone was placed motion sensors that sent signals to the receiver along off run. The sensors measured the acceleration and velocity 900 times per second.
Although the evaluation of the experiments are not yet complete, so the researchers have no clear connection . The rounder the stone is, the less it will bounce off the surface, and the longer it rolls.
Conversely, the ball-shaped stones make great leap, but does not reach as far.
Although the substrate affects the movements. Soft ground slows the movement better than the hard, hard ground can put bullet-shaped boulders in violent revolution.
This study will lead to better knowledge on how to avoid injuries in the risk of collapse areas. Researchers from WSL has also conducted similar tests in risk of collapse the Port Hills in New Zealand in the spring.
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