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8b.7 A block with mass of 4.00 kg and speed of 20.00 m's slides across a horizontal frictional counter. It then runs into and compress

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8b.7 A block with mass of 4.00 kg and speed of 20.00 m's slides across a horizontal frictional counter. It then runs into and compress a spring of spring constant k = 100 N/m. The frictional force is 3 N. What is the speed of the block after a compression distance of 2 m? [Answer: 17.2 m/s]

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