A straight piece of wire is coiled to form a spring. Is it a Chemical or ra physical

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Explanation:

If a piece of wire is coiled to form a spring, it is a physical change. This is because there is no change in it's bonds rather there is a change in its shape and figure. Also, Physical change is reversible such that the coiled piece of wire can be changed back to a straight piece of wire. But, A chemical change is irreversible.

So, This is a physical change.

Yes, it will change

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Explanation:

Friction always acts to oppose any relative motion between surfaces. if we push on the book with a force of less than 5N, the book won't move, because the frictional force will exactly balance the force we apply. if we push with a 1 N force, a 1 N friction force opposes us.