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A 99 g steel ball bearing rolls to the right at 172 cm/s and makes an elastic head-on collision with another steel ball bearing with a mass of 72 g that is initially at rest. After the collision, the 99 g ball moves at 48.47 cm/s.

a.The final velocity of the 72 g ball bearing in SI units is

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A 99 g steel ball bearing rolls to the right at 172 cm/s and makes an elastic head-on collision with another steel ball bearing with a mass of 72 g that is initially at rest. After the collision, the 99 g ball moves at 48.47 cm/s. a.The final velocity of the 72 g ball bearing in SI units is b.