A mass is supported by a spring so that it rests 0.5 m above a table top. The mass is pulled down 0.4 m and released at time t=0. This creates a periodic up-and-down motion, called simple harmonic motion. It takes 1.2 s for the mass to return to the low position each time. Could someone please give me an equation of the sinusoidal function when the height of the mass above the table top is a function of time for the first 2.0 s? Thanks.