A 78.0-kg fullback running east with a speed of 5.10 m/s is tackled by a 82.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b) Calculate the velocity of the players immediately after the tackle. (c) Determine the mechanical energy that is lost as a result of the collision. (d) Where did the lost energy go?

A 78.0-kg fullback running east with a speed of 5.10 m/s is tackled by a 82.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b) Calculate the velocity of the players immediately after the tackle. (c) Determine the mechanical energy that is lost as a result of the collision. (d) Where did the lost energy go?

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