We have the following information:  A softball ball has a mass of 0.18kg. The ball was dropped from a distance of one meter above the surface. The ball bounced to a height of 0.29 m. The time before the bounce was 0s and the time after the bounce was 0.73s. Answer: Find the velocity of each ball just before it hits the surface (initial velocity). Why do we only perform this calculation once? Calculate the velocity of each ball just after it hits the surface (end velocity). Find the moment of each ball before it hits the surface (initial moment). Find the moment of each ball after it hits the surface (final moment).

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