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Official Description: Physics-based animation in support library, where the animations are driven by physics force. You can use this Animation library to create smooth and realistic animations.

CommonsWare's Notes

This artifact includes a set of "physics-based" animations, such as SpringAnimation and FlingAnimation. These allow you to specify animation effects via physical attributes, such as the stiffness and damping ratio of a spring. These animations can be applied to a number of view properties, such a position, rotation, and scale.

As with many of the Jetpack classes, the dynamic animation classes originated in the Android Support Library. So, you may find articles and posts referring to those. Some of that material may still be relevant, but aim for docs that discuss the AndroidX classes to be safe.