BAVA Machines has a very good model of machine to remove nails.
Is for shoes but i check it on wood and works perfectly
A lever.
You are using a lever when you pull a nail with a hammer or bar.
It makes it easier to drive the nail into wood.
Friction
If a nail is not hit square on the top by the hammer it will bend and there is a likelihood that the wood will be damaged by hammer marks or the bent nail.
A lever.
A wedge would be best, specifically a nail or screw.
You are using a lever when you pull a nail with a hammer or bar.
no, the best thing that will is nail polish remover.
The nail presses the wood outward away from it. This compressed wood around the nail pushes back holding it in place.
into a piece of wood
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 .
Screws are a more secure fastening than nails because the only barrier to removing a nail is the friction of the sides of the nail against the wood, so it can be pulled loose by a simple torsion force. A screw, however, has threads, so a torsion force cannot remove a screw without destroying part of the wood in the process.
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.
you pull the trigger and the nail shoots out and into the wood.
The claw hammer can not only hammer a nail into wood but can , by way of the claw , grasp the head of the nail and be used to pry/leverage the nail from wood .