In a school experiment, I found the spring constant using Hooke’s law. When I drew the graph, the spring constant did not become 0 when the extension of the spring was 0 mm. Could you please explain why not? The spring constant k is [N/m], so if the displacement is 0m, k = 0 should be … Please help!
When the extension of the spring was 0 mm, the spring constant did not become 0?
Is it an extension spring? If it is an extension spring, it is due to the work of “initial tension”, which is its characteristic. The initial tension is the internal force of the tension coil spring that is in close contact when no load is applied, that is, the extension coil spring does not bend unless a force greater than this initial tension is applied.
In addition, it is difficult to manufacture a close contact extension spring with zero initial tension. If you want zero initial tension, you need to take measures such as increasing the pitch between the coils. Other detailed explanations about the initial tension are specified in this link , so we would appreciate it if you could refer to it.
