College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 94

Write the general equation of motion for a mass that is on a horizontal frictionless surface and is connected to a spring at equilibrium (a) if the mass is initially pulled in the + x axis from the spring (stretched) and released, and (b) if the mass is pushed in the x axis toward the spring (compressed) and released.