A nail is relatively easy to pull out of a dry board and difficult from a swollen one, why?
| June 3, 2021 | education
A nail is relatively easy to pull out of a dry board and difficult from a swollen one, why? after all, it would seem that water, playing the role of a lubricant, should reduce friction.
In this case, water does not act as a lubricant. A wet board swells under the influence of water, which increases the pressure on the walls of the nail, that is, it is compressed.
It is easier to pull a nail out of a dry board, because the fibers of the board are compressed, less pressure is applied to the nail than if the board is saturated with moisture.
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