Drive a wedge or prybar between the boards and pull. There will be some tearing of the surface, no way around that.
Use acetone.
A screw holds wood together better than a nail because the threading of a screw provides a horizontal grip on the wood. Nails are driven down into wood and have nothing but the pressure of the wood to keep them attached, which means it is easier to pull a nail straight out of a board than a screw.
The nail presses the wood outward away from it. This compressed wood around the nail pushes back holding it in place.
The girl isn't hurt when the nail is driven into the block of wood because the nail is not being driven into her body; it’s being driven into a separate, solid surface. The block of wood absorbs the impact and provides a stable backing, preventing any injury. Additionally, if she is positioned safely away from the area where the nail is being driven, this further ensures her safety.
into a piece of wood
When a nail is hammered into wood, the force creates friction between the nail and the wood, generating heat due to the resistance. This heat is also caused by the energy from the impact and the compression of the wood fibers around the nail.
The point is a "wedge" that separates the wood fibers as the nail enters, making it easier to drive into the wood without tearing the wood as a flat tipped nail would.
Notably , the claw-hammer which has a flat head on one end to drive the nail into the wood and has a claw opposite of the strike head to remove the nail from the wood using the principles of leverage to extract the embedded nail from wood .
The best technique for securely fastening wood using a wood nail is to pre-drill a hole slightly smaller than the nail diameter, then hammer the nail into the hole at a slight angle to ensure a tight grip.
Turn the nail upside down on a hard surface and hit it with your hammer. A dull nail breaks through the wood and a sharp one can split the wood.
Friction is the force that holds a nail or screw in wood. When a nail or screw is driven into wood, the friction between the fastener and the wood fibers creates resistance, preventing it from easily being pulled out.
If you are pulling a nail out of wood, you are using a lever as a simple machine. By applying force to one end of the lever (the nail), you are able to lift the nail out of the wood using the principle of torque.