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-A 11.0g object moving to the right at 18.6 cm/s makes an elastic head-on collision with...

-A 11.0g object moving to the right at 18.6 cm/s makes an elastic head-on collision with a 17.9g object moving in the opposite direction at 29.2 cm/s. What is the velocity of the 11.0g object after the collision (assume positive to the right)?
- What is the velocity of the 17.9g object after the collision?

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