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A simple harmonic oscillator consists of a block of mass 1. When t = 3.00 s, the position and velocity of the block are x = +0.129 m and v = +3.
A simple harmonic oscillator consists of a block of mass 1.90 kg attached to a spring of spring constant 196 N/m. When t = 3.00 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.