Yes glass will bounce on non hardened surfaces ... In a normal
situation (hard floor, rubber ball v. glass ball), the rubber ball will
bounce higher and the glass ball will most likely shatter. However, if
you change this to a floor that has a slight amount of give (vinyl
floor) the glass ball will bounce higher than the rubber ball.
Both balls will have the same amount of energy immediately before they
hit the floor, but when they strike, more energy is spent reforming the
rubber ball than the glass ball, so the glass ball has more energy going
up, therefore, going higher. This is because a glass ball hardly loses
any energy when struck, and the rubber ball does
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