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Why does a child feel more pain when she...

Why does a child feel more pain when she falls down on a hard cement floor, than when she falls on the soft muddy ground in the garden ?

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When a child falls on a cement floor, his body comes to rest instantly time taken by the body to come to stop is too small As `Fxxt=` Change in momentum = constant and t decreases , thereforce `F` increases The child is hurt more The reverse is true for soft muddy ground .
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