A 2-kg block A and a 1-kg block B are pushed together against a spring and tied with a cord. When

A 2-kg block A and a 1-kg block B are pushed together against a spring and tied with a cord.

When the cord breaks, the 1-kg block moves to the right at 8 m/s. What is the velocity of the 2
kg block?
Is the collision Elastic or inelastic? Give evidence.

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