Why we get hurt if we fall on hard floor but we don't get hurt if we fall on sand?
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When a man falls on a hard cemented floor his momentum reduced to zero in a very short time and hurt the man. Whereas when a man falls on a heap of sand. As sand can compress, it takes longer time for the man to hit the ground (or hard surface). Due to longer time, it reduces the man’s momentum gently and hence the man either will not get hurt or may get less injury.
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Aarav21:
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Yup... as compared to when he falls on sand as because the sand makes the rate of change of moment slow thus the force that he would receive on impact will also be less (Newton's 2nd law of motion!!!)
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Answer:
When a man falls on a hard cemented floor his momentum reduces to zero in a very short time and thus hurts the man.
On the other hand when a man falls on a heap of sand, it takes longer time for the man to hit the ground since sand can compress itself. Due to longer time, it reduces the man's momentum gently and hence the man either will not get hurt or may get less injury.
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