A car of mass 2800 kg collides with a truck of mass 4500 kg, Ask an Expert

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A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, stuck together. The car's velocity just before the collision was < 34, 0, 0 > m/s, and the truck's velocity just before the collision was < -12, 0, 29 > m/s. What is the velocity of the stuck-together car and truck just after the collision?

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