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Question

A force of 37N is required to stretch a spring a distance of 20 cm from its equilibrium position. What force is needed to compress the same spring 7 cm from its equilibrium position?

Answer 1

Spring Force with Hooke's Law:

F = -kx ( - denotes Force is always opposite to the stretch/compression)

37 = k x 0.2

k = 185 N/m

Same spring has the same "k" value for different forces

F = 185 x 0.07m

F = 12.95 ∼ 13N