A car of mass 2200 kg collides with a truck of mass 4800 kg, Ask an Expert

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A car of mass 2200 kg collides with a truck of mass 4800 kg, and just after the collision the car and truck slide along, stuck together. The car's velocity just before the collision was < 31, 0, 0 > m/s, and the truck's velocity just before the collision was < -14, 0, 22 > m/s.

(a) What is the velocity of the stuck-together car and truck just after the collision? explanation please :)

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