Question: Two 1 kg masses are separated by a spring of negligible mass. They are pushed together, compressing the spring. If the work done in compressing

Two 1 kg masses are separated by a spring of negligible mass. They are pushed together, compressing the spring. If the work done in compressing the spring is 10 J, find the change in mass of the system in kilograms. Does the mass increase or decrease?

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