This principle is used to finish up actions after one action has already been completed. Such as when a character stops, there hair keeps falling until it is still. It is a very important action to make stop motion look more real.
6: Slow-out and Slow-in
This principle shown how many frames there will be in different timing of an acton. In the beginning there might be a lot of frames to make the action look smooth, near the middle there are less frames to make the action hold up a little, and near the end there are more frames once again.
7: Arcs
This effect is used to create a smooth circular effect.