A 2.41 kg block and a 4.82 kg block are initially at rest on a frictionless, horizontal surface, with a compressed spring of negligible mass between them. When the blocks are released, they move off in opposite directions. If the final velocity of the 2.41 kg block is 3.55 m/s to the left, what is the final velocity of the 4.82 kg block? (The magnitude is 1.775 m/s, direction to the right)

How much does the kinetic energy of the system increase?

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