Posted by **ash** on Tuesday, April 9, 2013 at 5:16pm.

A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position.

A) What is the force constant of the spring?

B) The spring is then stretched 0.80m from its equilibrium position and then released with the velocity zero. Calculate the velocity of the mass when the mass passes again through the equilibrium position.

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