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In an American football game, a 89.3kg fullback running east with a speed of 5.07 m/s is tackled by a 95.9 kg opponent running north with a speed of 2.99 m/s.
a) If the collision is perfectly inelastic, compute the speed and direction of the players now after the tackle.
b) Decide the mechanical energy lost as a result of the collision.
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