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A titanium sphere with a mass of 474 g travelling with a velocity of 5.4 m/s...

A titanium sphere with a mass of 474 g travelling with a velocity of 5.4 m/s overtakes a steel sphere with a mass of 6.72 g traveling at the same direction. The two sphere collides elastically and the titanium sphere slows to 0.5 m/s in the same direction after the collision. WHat was the initial velocity of the steel sphere before the collision?

1.2

3.5

4.7

5.9

1.7

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