A 2.12 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.83 N/m. The mass is displaced 3.12 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. What is the force (including direction, choose the right to be positive) acting on the mass 3.46 s after it is released? B) How many times does the mass oscillate in 3.46 s? The above is my problem. I am having a hard time linking the SHM aspects with the kinematics aspects. I have calculated my w, found my period and frequency but i dont know where to take it from there. Any suggestions?