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Block 1, of mass m1 = 12.3 kg , moves along a frictionless air track with...

Block 1, of mass m1 = 12.3 kg , moves along a frictionless air track with speed v1 = 13.0 m/s . It collides with block 2, of mass m2 = 39.0 kg , which was initially at rest. The blocks stick together after the collision. Find the magnitude pi of the total initial momentum of the two-block system. Find vf, the magnitude of the final velocity of the two-block system. What is the change ΔK=Kfinal−Kinitial in the two-block system's kinetic energy due to the collision?

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