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A hammer og mass M falls from height h t...

A hammer og mass M falls from height h to drive a pile of mass m into the ground. The hammer makes the pile pentrate in the ground to a distance d, opposition force of penetration is given by -

A

`(m_(1)^(2)gh)/((m_(1)+m_(2))d)+(m_(2)+m_(1))g`

B

`(m_(1)+m_(2))gd`

C

`(m_(1)^(2)gh)/((m_(1)+m_(2))d)`

D

`(m_(1)^(2)gh)/((m_(1)+2m_(2))d)+(2m_(2)+m_(1))g`

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The correct Answer is:
A
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