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A 4.3-g object moving to the right at 34 cm/s makes an elastic head-on collision with...

A 4.3-g object moving to the right at 34 cm/s makes an elastic head-on collision with a 8.6-g object that is initially at rest.

What is the velocity of the 4.3-g mass after the collision?

What fraction of the initial kinetic energy was transferred to the 8.6-g block?

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