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It is less dangerous to jump from a high wall onto loose soil than onto a...

It is less dangerous to jump from a high wall onto loose soil than onto a concrete pavement. Why? What physics concept or principle or law is applied?

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Answer #1

Loose soil will provide a cushioning effect. In terms of physics, when we fall on a loose soil, there will be change in momentum as we hit the soil. However, the force which will act on us will have more time to act as we fall.

In case of concrete pavement, same change in momentum happens in less time means force applied on us will be more.

This is same reason why airbags prevent from serious injury because they just increase the time for change in momentum so that force acting on use will be reduced.  

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