13. A box of a certain mass is attached to a spring of spring constant 7.0 N/m and experience simple harmonic motion with an amplitude of 0.2 m. When the position of a box is at 0.4 A its speed is measured to be + 0.25 m/s. (Hint: x(t) = Asinwt). Calculate the period of the motion. ge A) 3.55 s B) 4.62 s C) 5.63 s D) 7.39 s E) 7.88 s

13. A box of a certain mass is attached to a spring of spring constant 7.0 N/m and experience simple harmonic motion with an amplitude of 0.2 m. When the position of a box is at 0.4 A its speed is measured to be + 0.25 m/s. (Hint: x(t) = Asinwt). Calculate the period of the motion. ge A) 3.55 s B) 4.62 s C) 5.63 s D) 7.39 s E) 7.88 s

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