A block of mass m1 = 2kg moves at a velocity of v1,i = 2m/s. It collides with another block of mass m2 = 1kg that is initially moving at a velocity of v2,i = 1m/s. After the collision, the first block is at rest. Positive is in the +x direction. 1. What is the velocity of the second block after the collision? 2. Is the collision elastic or inelastic? Explain.

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