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A 2kg block and an 8kg block are connected by a relaxed horizontal spring with spring-constant...

A 2kg block and an 8kg block are connected by a relaxed horizontal spring with spring-constant 300N/m. You pull the 8kg block with some constant horizontal force. There is a coefficient of kinetic friction between the blocks and the floor of μk = 0.3. After a time, the spring is stretched a certain constant amount, and the system moves with constant velocity. (a) Draw free-body diagrams for both blocks. (b) What pulling force did you apply? (c) How much is the spring stretched? (d) If instead you had pulled on the 2kg block, with the same force, how would the answer to (c) change?

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