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6. A 10-kg block on a horizontal surface with a coefficient of friction of .5. It...

6. A 10-kg block on a horizontal surface with a coefficient of friction of .5. It is attached to a light spring (force constant =11 00 N/m). The block is pulled to the right a distance of .25 m from equilibrium position and released. . What will be the speed of the block after it has moved 15cm back

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