What formula represents spring force?

The formula that represents spring force is based on Hooke's Law, which states that the force exerted by a spring is directly proportional to the extension or compression of that spring from its natural length. The formula is expressed as:

Spring Force = k × x

In this formula, "k" is the spring constant, which indicates the stiffness of the spring, and "x" is the extension (or compression) from the resting position of the spring. This fundamental relationship helps in understanding how springs behave under different forces, highlighting that as a spring is stretched or compressed, the force it exerts is proportional to that change in length.

Other choices relate to different physics principles: one involves Newton's second law of motion, which connects mass and acceleration, another refers to pressure calculations, and the last one discusses work done by a force over a distance. Therefore, the correct choice emphasizes the unique relationship between spring force, spring constant, and extension.