The motion is described by Displacement = Amplitude x sin (angular frequency x time) y = A x sin ( ω x t ) m = m x sin ( rad/s x s ) Any of the parameters in the motion equation can be calculated by clicking on the active word in the motion relationship above. Default values will be entered for any missing data, but those values may be changed and the calculation repeated. The angular frequency calculation assumes that the motion is in its first period and therefore calculates the smallest value of angular frequency which will match the other parameters. The time calculation calculates the first time the motion reaches the specified displacement, i.e., the time during the first period.