A 77.0-kg fullback running east with a speed of 5.60 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. (a) Explain why the successful tackle constitutes a perfectly inelastic collision. This answer has not been graded yet. (b) Calculate the velocity of the players immediately after the tackle. magnitude direction m/s north of east (c) Determine the mechanical energy that disappears as a result of the collision. Account for the missing energy. This answer has not been graded yet.