Question

Why a nail can be fixed into a wall?​

Answer 1

Answer:

Answer. It is the frictional force that allows us to fix a nail in a wall and knot to be tied. It is the friction between the surface of the nail and the wall that keeps the nail intact with the wall. Even knots in the ropes are held together due to the force of friction.

Answer 2

Explanation:

Nails can go right through, and then you might further damage the wall surface when you pull them out. Instead of drywall screws, use self-drilling screws with a large, flat washer head and coarse threads that are meant to bite into softwood lumber.