A spring with a force constant of 5.2 N/m has a relaxed length of 2.

A spring with a force constant of 5.2 N/m hasa relaxed length of 2.45 m. When a mass isattached to the end of the spring and allowedto come to rest, the vertical length of thespring is 3.57 m.Calculate the elastic potential energystored in the spring.Answer in units of J.