Principles of Animation is a course from IDC, IIT Bombay. This Animation principle refers to how all movements begin slowly, build momentum and then finish slowly. Basically easing in and easing out of the action. You can achieve believable life-like movements using the principle of slow in slow out. For more information visit Write to us at @ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Details here: