In the first week, Mr.George explained how to make the ball rebounding animation in the first week. As the most basic course of sports, I still think it is essential for creating animation.
1.Graph editor
The Graph Editor is presented as graph view of scene animation so you can create, view, and modify animation curves in various ways. For example, we can control interpolation between keyframes, extrapolation of curves, and change animation curve value and timing by altering the shape of animation curves using tangent handles.

2.Timeline

3. bouncing ball
The first principle is squash and stretch. This is the principle that animated objects will get longer or flatter to emphasize their speed, momentum, weight, and Max. There’s a bouncing ball that has squash and stretch.

At the apex, the ball is not moving. When falling, the speed of the ball increased in the index. Before and after contact with the ground, the ball reaches its highest rate.

From a physical point of view, gravity will pull it down when a ball bounces until it encounters obstacles (ground). Forced the small ball to play until the power was less than the gravity, eventually making it fall again.
I noticed that the speed of different spheres in the process of landing is also different. For example, in table tennis and bowling, the speed and rebound are all affected by the object itself, so we also need to maintain the authenticity of the object in the creation process.