Second Order Differential Equation

This lecture covers the solution of real inhomogeneous second-order differential equations, including a change of variable and trigonometric formulas. Physical examples of vertical oscillatory motion under gravity are presented, along with the concept of phase angle and gravitational field. The lecture concludes with the transformation of variables in the context of equilibrium positions for springs. Dr. Sylvain Bréchet guides through the mathematical derivations and physical interpretations.