A 81.5 kg linebacker (X) is running at 6.35 m/s directly toward the sideline of a football field. He tackles a 90.4 kgrunning back (O) moving at 8.61 m/s straight toward the goal line, perpendicular to the original direction of the linebacker. What is the common speed ?fvf of the players immediately after their impact? What is the angle ? of their motion relative to the sideline??

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