A block with mass M = 5.55 kg is sliding in the positive x-direction at Vi = 8.15 m/s on a frictionless surface when it collides elastically in one dimension with a stationary block with mass m = 1.55 kg. Determine the velocities, Vf and vf, of the objects after the collision. (a) Vf= m/s     (b) vf= m/s

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