Two-Dimensional Perfectly Inelastic Collisions

[scoop91]

A 25000 kg truck moving at 40 m/s on a road angled at 17° hits a 10000 kg van moving at 25 m/s on a road angled at 60° at an intersection between two the two roads. Since this is a two-dimensional perfectly inelastic collision, what is the final velocity of the wreck?


Not sure about which equation to use



Attempt at solution: Instantly stuck. Our professor did not give us the equation for two-dimensional perfectly inelastic collision.

 

[szimmy]

Thinking about any 2 dimensional problem such as kinematics, what is usually the first step when dealing with components that are not resolved in x and y directions?