Posted by **Elizabeth** on Friday, November 30, 2012 at 3:50pm.

A 0.56-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.13 to 0.26 m (relative to its unstrained length), the speed of the sphere decreases from 5.45 to 4.90 m/s. What is the spring constant of the spring? (The sphere hangs from the bottom of the spring.)

Answer in N/m

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