A block of mass m₁ = 18 kg slides along a horizontal surface (with friction, μk = 0.35) a distance d = 2.95 m before striking a second block of mass m₂ = 9.75 kg. the first block has an initial velocity of v = 7.75 m/s. Assuming that block one stops after it collides with block two, what is block two's velocity after impact in m/s?

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