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You push a 4.5 kg block against a horizontal spring, compressing the spring by 26 cm....

You push a 4.5 kg block against a horizontal spring, compressing the spring by 26 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 84 cm from where you released it. The spring constant is 280 N/m. What is the coefficient of kinetic friction between the block and the table?

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