👉 In physics, a "soubresaut" is a type of instability that occurs when an object, such as a pendulum or a spring, oscillates with its equilibrium position in one direction, but then reverses direction and moves back to that point. This can lead to the motion of the system as a whole, which is known as a "sudden change" or "sudden oscillation". Soubresauts are an important concept in mechanics and have been studied extensively in
