In Exercise, let us take the position of mass when the spring is unstreched as x = 0, and the direction from left to right as the positive direction of x-axis. Give x as a function of time t for the oscillating mass if at the moment we start the stopwatch (t = 0), the mass is:
At the mean position.
In what way do these functions for SHM differ from each other, in frequency, in amplitude or the initial phase?