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a 4000kg truck traveling with a velocity of 20m/s due on South collides head on with...

a 4000kg truck traveling with a velocity of 20m/s due on South collides head on with a 1320kg car traveling with a velocity of 10m/s due north. two vehicles stick together after the collision.

A. what are the magnitude and direction of the momentum of each vehicle prior to the collision?

B. what are the magnitude and direction of the velocity of both vehicles after they collide?

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