hi i am doing physics 30 by modules after doing it by class. and i am having a hard time working this question out. A car with a mass of 1400kg is westbound at 50km/h. it collides at an intersection with a northbound truck having a mass of 2000kg and travelling at 40km/h. what is the inital common velocity of the car and truck immediatley after the collision if they have an inelastic collision? i did all my conversions but i just cant figure out the proper steps in receiving the answer.