Four Different Ball Reference

Bowling Ball Reference 

Here is a video reference of a bowling ball bouncing, this shows that the bowling ball when tossed at different heights it makes a relatively small bounce and after it finishes bouncing it rolls down any unsteady ground e.g. if dropped on on a slant it will roll down until it hits an obstacle in its path. As seen in the reference the shape of the ball doesn't deform because of the hard material a bowling ball has.

Rubber Ball Reference

Here is a video reference of a rubber ball bouncing, this shows that when the ball bounces at any height the rubber ball squashes and stretches ever so slightly. The rubber ball bounces really high showing that material can be squashed and stretched ever so slighty becuase it is a solid material. The rubber ball will also roll in a direction of unsteady ground but obstacles such as rocks and litter will easily stop the ball in it its path.

Tennis Ball Reference

Here is a video reference of a tennis ball bouncing, in this video the tennis ball is filled with nothing (air) and that is why the shape of the tennis ball is easily stretched and squahsed. Also the tennis is ball is also has a layer of rubber which is why it bounces so well. The outside of the material is made of felt and is used for durability of the ball, which is not really needed in my animation.

Rubber Ball (liquid filled)

Here is another reference of another rubber ball but this one is filled with a liquid rather than a solid. As the video shows there is more of a squash and stretch being shown and this is mostly beacuse of the material and becuase of the liquid inside. If there was less liquid inside the ball the stretch and squash will look more exaggerated but the ball looks quite fall of liquid and because of the outside material the liquid can't escape. Also the ball does bounce after hitting the floor but not as high as a solid rubber ball would.