Please help!?

Question

A blue car with a mass of mcar = 2000 kg and a yellow truck with mass mtruck = 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?

Answer 1

vsin43 = 7*9,000/11,000
v = 8.3978 m/s