We will use a video to study simple harmonic motion by analyzing the behavior of three separate mass-spring systems, which serve as a useful model for this special type of motion. specifically, we will: examine the underlying principles behind simple harmonic motion. take measurements from the video for three trials of vertically-oscillating masses to determine their periods of oscillation. verify that the equation for the period of a mass-spring system applies to these oscillators by comparing it to the measurements.