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Physics, 07.03.2020 03:23 samuelmarchettp9i3sa

Two 4.2 kg masses are connected to each other by a spring with a force constant of 28 N/m and a rest length of 1.0 m. If the spring has been compressed to 0.80 m in length and the masses are traveling toward each other at 0.42 m/s (each), what is the total energy in the system (in J)?

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