The position where the spring gains its potential energy when it is being stretched is w.
What is potential energy?
Potential energy refers to the mechanical energy, stored energy, or energy caused by its position. The energy that a ball has when perched at a top of a steep hill when it is about to roll down should represent an example of potential energy. It is the energy that should be held by an object due to the position related to the other objects.
Also, the spring should be gained at the time when it should be stretched.
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a spring gains its potential energy when it is being stretched
