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An iron nail of mass 0.2 kg is dropped f...

An iron nail of mass 0.2 kg is dropped from a height h=1m from level of a sand bed. If it penetrates through a distance x=0.1m in the sand before coming to rest. Calculate the average force exerted by the sand on the nail. (Take g=`10m//s^(2)`)

A

`mg(h/x+1)`

B

`mg(x/h+1)`

C

`mg(h/x-1)`

D

`mg(x/h-1)`

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The correct Answer is:
A
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