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## Homework Statement

Whether or not the spring is vertical or not, assuming that the spring is ideal, is F

_{net}always equal to -kx?

Is it incorrect to write the sum of the forces of a vertical spring as F

_{net}= -kx - mg?

And does hooke's law account for the force of friction on a horizontal spring? If not would the sum of the forces look like this? F

_{net}= -kx - [itex]\mu[/itex]N

## Homework Equations

F = -kx