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Hammer of mass M strikes a nail of mass ...

Hammer of mass M strikes a nail of mass 'm' with a velocity 20 m/s into a fixed wall. The nail penetrates into the wall to a depth of 1 cm. The average resistance of the wall to the penetration of the nail is

A

`(M^2/(m+m))xx10^3`

B

`(2M^2)/(M+m)xx10^4`

C

`(M+m)/(M^2)xx10^2`

D

`(M^2)/(M+m)xx10^2`

Text Solution

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The correct Answer is:
B
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