A is the amplitude of the wave in metres is the angular frequency given by. For example, a pendulum swings through its equilibrium point (straight down), then swings to a maximum distance away from the center. E.g. In to and fro motion of a particle about a mean position, … The Amplitude formula can be written as. of methods. Furthermore, in this topic, you will learn about the amplitude, amplitude formula, formula’s derivation, and solved example. Amplitude Formula Amplitude Formulas - Equations for Wave Amplitude Amplitude refers to the maximum change of a variable from its mean value (when the variable oscillates about this mean value). Amplitude is something that relates to the maximum displacement of the waves. It is represented by A. where, y is the displacement of the wave in metres. Φ is the phase difference. For an object in periodic motion, the amplitude is the maximum displacement from equilibrium. Besides, after completing the topic you will be able to understand amplitude. Amplitude Formula. Amplitude Formula. The amplitude A can be found by rearranging the formula: The sine of 8.50 π can be solved (keeping in mind that the value is in radians) with a calculator: sin(8.50 π) = 1. The amplitude of the spring can be found by no. The amplitude of a wave is the maximum displacement of the particle of the medium from its equilibrium position. Therefore, the amplitude at time t = 8.50 s is: A = 0.140 m. The amplitude of the pendulum's oscillation is A = 0.140 m = 14.0 cm