And if you were to pull with a much greater force, the spring would stretch a much greater extent. ![]() If you were to pull with just a little force, the spring would stretch just a little bit. If you were to hold the bottom of the spring and pull downward, the spring would stretch. The spring hangs in a relaxed, unstretched position. Consider the system shown at the right with a spring attached to a support. We will begin our discussion with an investigation of the forces exerted by a spring on a hanging mass. Such quantities will include forces, position, velocity and energy - both kinetic and potential energy. ![]() Now we will investigate the motion of a mass on a spring in even greater detail as we focus on how a variety of quantities change over the course of time. The mass on a spring motion was discussed in more detail as we sought to understand the mathematical properties of objects that are in periodic motion. In a previous part of this lesson, the motion of a mass attached to a spring was described as an example of a vibrating system.
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