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Problem 20 - Entrance Test

The potential energy of a spring is given by the equation U = (1/2)kx^2, where U is the potential energy, k is the spring constant, and x is the displacement from the equilibrium position. If the spring constant is 100 N/m and the displacement is 2 m, what is the potential energy of the spring?

Correct: C

The potential energy of the spring can be calculated using the equation U = (1/2)kx^2. Substituting the given values, we get U = (1/2) * (100 N/m) * (2 m)^2 = (1/2) * 100 * 4 = 200 J.