Bending a nail with a hammer is an example of a physical change. Here’s why:
When you bend a nail, you are changing its shape and possibly its size, but you are not altering its chemical composition. The nail remains made of the same material (usually iron or steel) before and after bending. No new substances are formed during this process.
Physical changes are changes that affect the form of a substance but do not change its chemical identity. Examples include cutting, bending, melting, and boiling. In contrast, a chemical change involves a chemical reaction, resulting in the formation of one or more new substances with different properties.
In summary, bending a nail with a hammer is a physical change because it only alters the nail’s physical appearance without changing its chemical makeup.