1. The problem statement, all variables and given/known data A Cart is floating on an airtrack and is connected by a spring to one fixed object. The cart executes a simple harmonic motion with a period of 4 seconds. Its mass is 2kg. Its maximum displacement from rest position is 1.8m. Calculate the spring constant and provide units. 2. Relevant equations F= -kx 3. The attempt at a solution The units would be N/m i am guessing but i am still a little lost. k is the spring constant rearranged it should be: k = F/x right?