In a car accident, car A of mass 1000 kg running east at 20 m/s is hit by car B of mass 1500 kg that is running due north at 10 m/s the two cars are stuck together after collision.

A: What are the momentums and kinetic energies of those two cars before collision?

B: What is their velocity of the wreckage right after collision?

C: What is the total kinetic energy loss during the collision?