What is the work done by the spring force when a block moves from xi to xf? - WORK, ENERGY, AND POWER Quiz | GKFix.in

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Question

What is the work done by the spring force when a block moves from xi to xf?

A. Ws = k(xi − xf)
B. Ws = ½kxi² − ½kxf²
C. Ws = k(xi² − xf²)
D. Ws = ½k(xf² − xi²)