A nail is driven into a wooden board by using a hammer. The impact of the hammer on the head of the nail produce a thrust of 25 N. If the area of the head is 0.5`mm^2` and of the tip 0.1`mm^2`. Find the pressure on the head and the top of the tail.

Explanation

`A_1=0.5mm^2=0.5xx10^-6m^2`
`A_2=0.1mm^2=0.1xx10^-6m^2`
`P_1=(F)/(A_1)=(25N)/(0.1xx10^-6m^2)=250xx10^6(N)/(m^2)=25xx10^7Pa`