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A vertically mounted spring (k = 900 N/m) is compressed by 20.0 cm relative to its...

A vertically mounted spring (k = 900 N/m) is compressed by 20.0 cm relative to its unstrained length. A mass (m = 0.30 kg) is placed at rest against the spring. When the spring is released, the mass is launched vertically in the air. What is the speed of the mass (m) when it passes by a point located 4.08 m above the release point?

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