This is another post of kinematics, which is about objects in motion. In this picture it is a eraser ball rolling on a table. This is different from the bouncing basketball because the basketball had an acceleration in the y and x axis, while this eraser ball only has an acceleration in the x axis. It doesn't mean that gravity is not important, gravity is always on but the acceleration in the x axis is what is important. When the ball rolls off the table then it will become 2D kinematics because gravity then plays a factor as well as the acceleration in the x axis.
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