Recent content by micopl

I mean oscillating system which can be e.g. a mass connected to a spring, and the other end of the spring is forced with an oscillating force.

Lets consider this definition: If the average power supplied to the system (absorbed power) is less than the average power lost by the system (emitted power) then the system is stable (during the time in which the power was averaged). Is such a definition of stability valid?