Compute all parts of given question:
Question: A mass of 0.15 kg is pushed against a spring that has a force constant of k=130.0 N/m compressing the spring a distance of 7.0 cm.
Part A: What is the energy stored in the spring-mass system?
Part B: After the spring is released, how fast is the spring moving?
I need help to find the energy stored in the spring-mass system.