15. Find the differential equation that describes the following. An 8 lb weight stretches a spring 2 feet. The weight is released from rest at a point 1 foot above equilibrium. The spring exhibits simple harmonic motion. A. x" + 8x + 0, x(0) = 1, x'(0) = 0 B. x" + 16x + 0, x(0) = 0, x'(0) = -1 C. x" + 4x + 0, x(0) = -1, x'(0) = 0 D. x" + 16x + 0, x(0) = -1, x'(0) = 0 E. None
15. Find the differential equation that describes the following. An 8 lb weight stretches a spring 2 feet. The weight is released from rest at a point 1 foot above equilibrium. The spring exhibits simple harmonic motion. A. x" + 8x + 0, x(0) = 1, x'(0) = 0 B. x" + 16x + 0, x(0) = 0, x'(0) = -1 C. x" + 4x + 0, x(0) = -1, x'(0) = 0 D. x" + 16x + 0, x(0) = -1, x'(0) = 0 E. None
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