Can someone please explain this to me.....I do not understandthe question but it

Question

Can someone please explain this to me.....I do not understandthe question but it does have to deal with physics.... If I jump off a table and land holding my knees rigid, ithurts. If I bend my knees as I land it does not hurt asmuch. Explain why that is so. Can someone please explain this to me.....I do not understandthe question but it does have to deal with physics.... If I jump off a table and land holding my knees rigid, ithurts. If I bend my knees as I land it does not hurt asmuch. Explain why that is so.

Explanation / Answer

   You hit the gound with same momentum,whether knees are bent or not.    Force   =   changein momentum / time    When knees are not bent, legs experiencegreater force as the time over which momentum is reduced to zero isvery small.    On bending the knees, although change inmomentum remains the same, time is greately increased. This resultsin less force and hence less hurting.

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