A blue car with a mass of 2000 kg and a yellow truck with mass 9000 kg enter an intersection. The truck comes from the south at vtruck = 7 m/s, and the car comes from the west. When the two collide they stick together and slide at an angle of q = 43° north of east.
What is the speed of the pair after the collision?
how can i do anything with question without speed of the blue car?
i know p=63000, and angle plays into it, but can't figure this out