Scientists reveal how falling springs are not affected by gravity

(Summary description)According to foreign media reports, the toy spring is almost the toy of most people's childhood, but its falling situation is questionable. In the environment of gravity, if its top is suspended vertically and stationary, and then released until its collapsed top The toy spring will only start to fall when it collides with the bottom. However, according to foreign media reports, researchers from the University of Sydney in Australia recently explained the principle of this kind of falling that is not affected by gravity.

Time of issue:2019-12-30
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According to foreign media reports, the toy spring is almost the toy of most people's childhood, but its falling situation is questionable. In the environment of gravity, if its top is suspended vertically and stationary, and then released until its collapsed top The toy spring will only start to fall when it collides with the bottom. However, according to foreign media reports, researchers from the University of Sydney in Australia recently explained the principle of this kind of falling that is not affected by gravity.

In fact, the principle of the falling suspension time of this toy spring is very simple. According to the article published by the scientists, because "the tension collapse of the toy spring is top-down, when the spring starts to release from the top, it takes a certain amount of time for the wavefront of the object to propagate to the bottom."

Given the notion that a signal that follows gravity has to travel through matter, Associate Professor Wheatland at the University of Sydney said: "You change something at the top and it has to take time for that information to propagate to the bottom of the spring, and that's a signal. .whatever you do to an object in an attempt to produce a change is actually a signal.Causality means you did something first.Causality also exists here, if the two are not in the same place, the propagation of the signal needs to be time."

Scientists have mathematically explained how the signal propagates, claiming that an undergrad in physics can explain it. At the same time, the scientists pointed out that the model is not universal, because it takes into account the natural properties of toy springs and the effect of each spring hitting the next.

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