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April 21, 2014

Homework Help: Physics(Please respond)

Posted by Hannah on Sunday, June 10, 2012 at 3:46pm.

A 0.33-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.12 to 0.26 m (relative to its unstrained length), the speed of the sphere decreases from 5.3 to 4.2 m/s. What is the spring constant of the spring?


I know that the formula is F=-kx
but i am not sure what to plug in since there are two sets of numbers plus the mass.

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