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a block of mas m = 4.1 kg slides head on into a spring of spring constant k = 430 N/m. When the block stops, it has compressed the spring by 9.8 cm. The coefficient of kinetic friction between block and floor is 0.21. (g = 9.8m/s2) 00000000000 0 What is the block's speed just as it reaches the spring. m/s