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1. A spring with a force constant of 5.2 N/m has a relaxed length of 2.45 m. When a mass is attached to the

1. A spring with a force constant of 5.2 N/m has a relaxed length of 2.45 m. When a mass is attached to the end of the spring and allowed to come to rest, the vertical length of the spring is 3.57 m. Calculate the elastic potential energy stored in the spring.

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