Instead of exerting a proportional force, these springs exert a near-constant force (hence the name). What is a constant force spring?Ĭonstant force springs are unlike the types mentioned above in that they do not obey Hooke’s Law. For torsion springs, torque replaces force, and angular distance in radians replaces linear distance. Torsion springs obey Hooke’s Law, but it is an angular form (□ = kθ ) of the equation rather than linear. Common applications of torsion springs are those found in clothespins and in traditional mouse traps. Instead of being compressed or extended, a torsion spring is twisted to store potential energy. Torsion springs are wound tightly like an extension spring, although the ends of the spring typically extend away from the spring in a non-helical shape. They are naturally at rest in a tightly coiled, compressed position, contain the most potential energy when someone steps onto the trampoline and extends them, and they release that energy as they tighten up again (pulling the canvas taut and flinging the jumper into the air).
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