Problem on the potential energy in the spring at this distance

Question

A spring of constant k = 100 N/m hangs at its natural length from a fixed stand. A mass of 3 kg is hung on the end of the spring, and slowly let down until the spring and mass hang at their new equilibrium position.

Problem on the potential energy in the spring at this distance

The spring is now pulled down an additional distance x and released from rest. What is the potential energy in the spring at this distance?

 

 

 

 

 

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