As the two materials come together adhesion. Using the force from the exertion of the hand and the weight of the hammer head nail, nail down the strike until buried in the material.
Composite bonding the two pieces come together. The force exerted by the hand of man, and the weight of the hammer hitting the nail on the nail embedded in the material.
The two pieces of material to seize the island. Using the force from the exertion of the hand and the weight of the hammer head steel nail to nail that buried in the material.