How fast was the linebacker moving just before the collision

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An MSU linebacker of mass 112.0 kg sacks a UM quarterback of mass 86.0 kg. Just after they collide, they are momentarily stuck together, and both are moving at a speed of 3.30 m/s. If the quarterback was at rest just before he was sacked, how fast was the linebacker moving just before the collision?

Reference no: EM13337462

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