Learning From Real Springs
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Many springs do not obey Hooke's Law because they are constructed to have an intrinsic tension which must be overcome before normal elongation occurs. This property, well-known to engineers, is universally neglected in elementary physics courses. In fact it can be used to enhance learning and to deepen understanding of potential energy.
DepartmentPhysics and Astronomy
Bassichis, William (2013). Learning From Real Springs. Available electronically from