spring is at rest in a somewhat stretched configuration (due to the added mass), then raise the spring above the equilibrium position and release it so it oscillates vertically. Measure the time it takes for several (12-25) oscillations, then determine the period from this data. Add more mass and repeat this process for 7 more trials with masses NOT TO EXCEED 400G!! Record all data in the table below. Trial Mass (g) Number of Total time for Period (s) | Number oscillations oscillations (s) r 1 o NN O AWM