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• A running back with a mass of 90 kg and a velocity of 9 m/s (toward the right) collides with, and is held by, a 135-kg defensive tackle going in the opposite direction (toward the left). What is the velocity of the tackle before the collision for their velocity afterward to be zero? (Remember, velocity is a vector)

A running back with a mass of 90 kg and a velocity of 9 m/s (toward the right) collides with, and is held by, a 135-kg defensive tackle going in the opposite direction (toward the left). What is the velocity of the tackle before the collision for their velocity afterward to be zero? (Remember, velocity is a vector)

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