Mastering physics homework: Mass oscillating on a vertical spring

[BadAtPhysic]

Homework Statement

A 50- cm -long spring is suspended from the ceiling. A 290 g mass is connected to the end and held at rest with the spring unstretched. The mass is released and falls, stretching the spring by 14 cm before coming to rest at its lowest point. It then continues to oscillate vertically.
Part A
What is the spring constant?
Express your answer with the appropriate units.

Relevant Equations

N/A

I tried 20.31 and I got it wrong. The equation I attempted was ((.29)(9.8))/(.14). Can someone explain how to do this problem?

 

[kuruman]

According to our rules, to receive help, you need to show some credible effort towards answering the question. What you show, ((.29)(9.8))/(.14), is not credible and is not even an equation. You need to do better than this.

Please read, understand and follow our homework guidelines, especially item 4, here
https://www.physicsforums.com/threads/homework-help-guidelines-for-students-and-helpers.686781/

 

[haruspex]

Homework Statement: A 50- cm -long spring is suspended from the ceiling. A 290 g mass is connected to the end and held at rest with the spring unstretched. The mass is released and falls, stretching the spring by 14 cm before coming to rest at its lowest point. It then continues to oscillate vertically.
Part A
What is the spring constant?
Express your answer with the appropriate units.
Relevant Equations: N/A

I tried 20.31 and I got it wrong. The equation I attempted was ((.29)(9.8))/(.14). Can someone explain how to do this problem?

Consider three positions of the mass: where it was released from, where it reached at its lowest point and the equilibrium position. What is the relationship? Which does your "equation" represent?