A block of mass m1 = 1.57 kg, initially moving to the right with a velocity of +3.69 m/s on a frictionless horizontal track, collides with a massless spring attached to a second block of mass m2 = 2.23 kg moving to the left with a velocity of −2.77 m/s,as shown in Figure a. The spring has a spring constant of 6.29  102 N/m. (a) Determine the velocity of block 2 at the instant when block 1 is moving to the right with a velocity of +3.00 m/s, as shown in Figure b. (Indicate the direction with the sign of your answer.) (b) Find the compression of the spring.

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