This class learned about the movement patterns and adjustment curves of hard and soft balls, and gained a better understanding of the curve patterns of rolling and bouncing balls.
The curve of motion of a soft ball, it has to be a little bigger, to have some waves, better for the little ball to bounce, elastic motion means that the object is subjected to a force that produces a change in shape, producing an elastic force, and when the shape disappears, the elastic force disappears accordingly, the shape of this soft ball of mine does not reflect it.
The law of motion of a hard ball, which has a relatively gentle curve compared to a soft ball, is not very elastic, just like a very dense object smashed down, so the curve should not fluctuate too much