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Hooke's Law. When an elastic object - such as a spring - is stretched, the increased length is called its extension. The extension of an elastic object is directly proportional to the force applied to it: F = k Ã e. F is the force in newtons, N. k is the 'spring constant' in newtons per metre, N/m. e is the extension in metres, m.
Hookeâs Law College Physics Lab PH 141 Hooke's Law and the Work done by a Spring Purpose: To verify Hooke's law for springs, and determine the spring constant which characterizes the force exerted by a spring. To verify the relationship the amount of work done by a spring as it is stretched. Discussion: If a mass m on a spring is displaced from the equilibrium position (x 0 = 0) to a new position x, Hooke's law states that the spring will exert a restoring force on the mass.