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A 1800-kg car approaches an intersection traveling north at 20.0 m/s. A 1600-kg car approaches the...

A 1800-kg car approaches an intersection traveling north at 20.0 m/s. A 1600-kg car approaches the same intersection traveling east at 10.0 m/s. The two cars collide at the intersection and lock together. Ignoring any external forces that act on the cars during the collision, what is the velocity of the cars immediately after the collision?

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