A (10-mathrm{kg}) block is attached to a spring of stiffness (3 times 10^{4} mathrm{~N} / mathrm{m}). The

Question:

A $10-\mathrm{kg}$ block is attached to a spring of stiffness $3 \times 10^{4} \mathrm{~N} / \mathrm{m}$. The block slides on a horizontal surface with a coefficient of friction of 0.2 . The block is displaced $30 \mathrm{~mm}$ and released. How long will it take before the block returns to rest?

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