A 90.0-kg fullback running east with a speed of5.00 m/s is tackled by a 95.0-kg opponent running northwith a speed of 3.00 m/s. (a) Why does the tackle constitutea perfectly inelastic collision? (b) Calculate the velocity ofthe players immediately after the tackle and (c) determinethe mechanical energy that is lost as a result of the collision.(d) Where did the lost energy go?

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