An object with mass m1 = 1kg moving to the right at a speed of 4m / s collides with a spring attached to a second block of mass m2 = 2kg moving left at 2m / s on a horizontal plane without friction as shown in the figure. The force constant of the spring is 105N / m and find the compression amount of the spring when the mass m1 moves at a speed of 3m / s to the right.

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