Newton's cradle

This exercise looks at the principle of Slow In and Slow Out. It turned out to work really well and look realistic and believable. This principle refers to the way that all movements start slow and build up speed during the action. Without Slow In and Slow Out all movements look mechanical. When I did the animation without playing around with the timing, it turned out looking static. To fix that, I used the Graph Editor to create that snappy feeling when the first or the last ball hits the one next to it. This way I avoided the mechanical feeling of the whole animation.

Tennis and Cannon Ball 

For this exercise I was asked to demonstrate the principle of Slide In Slide Out in order to show different weight of the objects.
The timing in this animation is the major thing that contributes to the good final product. We know that the tennis ball is way lighter that the cannon one and I had to figure out how to represent that idea using Slide In Slide Out. The high bounces and active rotation of the tennis ball make it appear light and believable. While the slow and clumsy movement of the cannon ball gives it weight and gives the audience to understand the difference between the two balls.