Answers

2016-04-11T09:01:57+05:30
When he falls on a heap of sand then time is extended to reach the ground hence momentum decreases gradually but when he falls on a regular cemented floor, momentum changes rapidly and hence he is hurted badly. Please mark as Brainliest
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2016-04-11T11:17:39+05:30
When a man falls on sand, it is not hard so the time is extended and the momentum is reduced. but the cement floor is very hard so the time is very less and momentum is not reduced so he gets hurted very badly or even may die
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