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10. A spring expands and sets a 4.00 kg mass into motion across a frictionless surface....

10. A spring expands and sets a 4.00 kg mass into motion across a frictionless surface. The initial compression of the spring is 0.160 m. If the mass moves with a velocity of 2.00 m/s after the spring has expanded, what is the spring constant of the spring?

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