Physics, 19.01.2021 20:40 live4dramaoy0yf9

A 0.68-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstrained length quadruples. What is the mass of the second block

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A 0.68-kg block is hung from and stretches a spring that is attached to the ceiling. A second block...